diff --git a/api/db/database-builder/factory/build-knowledge-element-snapshot.js b/api/db/database-builder/factory/build-knowledge-element-snapshot.js
index 24c1529f4f2..00883a7acce 100644
--- a/api/db/database-builder/factory/build-knowledge-element-snapshot.js
+++ b/api/db/database-builder/factory/build-knowledge-element-snapshot.js
@@ -7,24 +7,20 @@ import { buildUser } from './build-user.js';
 
 const buildKnowledgeElementSnapshot = function ({
   id = databaseBuffer.getNextId(),
-  userId,
-  snappedAt = new Date('2020-01-01'),
   snapshot,
   campaignParticipationId,
+  userId,
 } = {}) {
-  const dateMinusOneDay = new Date(snappedAt.getTime() - 1000 * 60 * 60 * 24 * 7);
-  userId = _.isUndefined(userId) ? buildUser().id : userId;
   if (!snapshot) {
     const knowledgeElements = [];
-    knowledgeElements.push(buildKnowledgeElement({ userId, createdAt: dateMinusOneDay }));
-    knowledgeElements.push(buildKnowledgeElement({ userId, createdAt: dateMinusOneDay }));
+    userId = _.isUndefined(userId) ? buildUser().id : userId;
+    knowledgeElements.push(buildKnowledgeElement({ userId, createdAt: new Date('2020-01-01') }));
+    knowledgeElements.push(buildKnowledgeElement({ userId, createdAt: new Date('2020-01-01') }));
     snapshot = new KnowledgeElementCollection(knowledgeElements).toSnapshot();
   }
 
   const values = {
     id,
-    userId,
-    snappedAt,
     snapshot,
     campaignParticipationId,
   };
diff --git a/api/db/database-builder/factory/knowledge-elements-snapshot-factory.js b/api/db/database-builder/factory/knowledge-elements-snapshot-factory.js
index d6b6c896cf7..c2cfc0da193 100644
--- a/api/db/database-builder/factory/knowledge-elements-snapshot-factory.js
+++ b/api/db/database-builder/factory/knowledge-elements-snapshot-factory.js
@@ -1,13 +1,11 @@
 import { databaseBuffer } from '../database-buffer.js';
 import { buildKnowledgeElement } from './build-knowledge-element.js';
 
-function buildSnapshot({ id, userId, snappedAt, knowledgeElementsAttributes, campaignParticipationId }) {
+function buildSnapshot({ id, knowledgeElementsAttributes, campaignParticipationId }) {
   const knowledgeElements = knowledgeElementsAttributes.map((attributes) => buildKnowledgeElement(attributes));
 
   const values = {
     id,
-    userId,
-    snappedAt,
     snapshot: JSON.stringify(knowledgeElements),
     campaignParticipationId,
   };
diff --git a/api/db/seeds/data/common/tooling/campaign-tooling.js b/api/db/seeds/data/common/tooling/campaign-tooling.js
index e3cb43e9638..5d351ddc194 100644
--- a/api/db/seeds/data/common/tooling/campaign-tooling.js
+++ b/api/db/seeds/data/common/tooling/campaign-tooling.js
@@ -238,8 +238,6 @@ async function createAssessmentCampaign({
 
       if (isShared) {
         databaseBuilder.factory.buildKnowledgeElementSnapshot({
-          userId,
-          snappedAt: sharedAt,
           snapshot: new KnowledgeElementCollection(keDataForSnapshot).toSnapshot(),
           campaignParticipationId,
         });
@@ -402,8 +400,6 @@ async function createProfilesCollectionCampaign({
         );
       }
       databaseBuilder.factory.buildKnowledgeElementSnapshot({
-        userId,
-        snappedAt: sharedAt,
         snapshot: new KnowledgeElementCollection(keDataForSnapshot).toSnapshot(),
         campaignParticipationId,
       });
diff --git a/api/scripts/prod/generate-knowledge-element-snapshots-for-campaigns.js b/api/scripts/prod/generate-knowledge-element-snapshots-for-campaigns.js
index b0da1f44871..def2e2219fe 100644
--- a/api/scripts/prod/generate-knowledge-element-snapshots-for-campaigns.js
+++ b/api/scripts/prod/generate-knowledge-element-snapshots-for-campaigns.js
@@ -46,21 +46,17 @@ function _validateAndNormalizeArgs({ concurrency, maxSnapshotCount }) {
 
 async function getEligibleCampaignParticipations(maxSnapshotCount) {
   return knex('campaign-participations')
-    .select('campaign-participations.userId', 'campaign-participations.sharedAt', 'campaign-participations.id')
-    .leftJoin('knowledge-element-snapshots', function () {
-      this.on('knowledge-element-snapshots.userId', 'campaign-participations.userId').andOn(
-        'knowledge-element-snapshots.snappedAt',
-        'campaign-participations.sharedAt',
-      );
-    })
+    .select('campaign-participations.id', 'campaign-participations.userId', 'campaign-participations.sharedAt')
+    .leftJoin(
+      'knowledge-element-snapshots',
+      'knowledge-element-snapshots.campaignParticipationId',
+      'campaign-participations.id',
+    )
     .whereNotNull('campaign-participations.sharedAt')
     .where((qb) => {
-      qb.whereNull('knowledge-element-snapshots.snappedAt').orWhereRaw('?? != ??', [
-        'campaign-participations.sharedAt',
-        'knowledge-element-snapshots.snappedAt',
-      ]);
+      qb.whereNull('knowledge-element-snapshots.campaignParticipationId');
     })
-    .orderBy('campaign-participations.userId')
+    .orderBy('campaign-participations.id')
     .limit(maxSnapshotCount);
 }
 
@@ -79,8 +75,6 @@ async function generateKnowledgeElementSnapshots(
       });
       try {
         await dependencies.knowledgeElementSnapshotRepository.save({
-          userId,
-          snappedAt: sharedAt,
           snapshot: new KnowledgeElementCollection(knowledgeElements).toSnapshot(),
           campaignParticipationId: id,
         });
diff --git a/api/scripts/prod/populate-campaign-participation-id-in-knowledge-element-snapshot.js b/api/scripts/prod/populate-campaign-participation-id-in-knowledge-element-snapshot.js
deleted file mode 100644
index e0a79a3328b..00000000000
--- a/api/scripts/prod/populate-campaign-participation-id-in-knowledge-element-snapshot.js
+++ /dev/null
@@ -1,159 +0,0 @@
-import { knex } from '../../db/knex-database-connection.js';
-import { Script } from '../../src/shared/application/scripts/script.js';
-import { ScriptRunner } from '../../src/shared/application/scripts/script-runner.js';
-
-const DEFAULT_CHUNK_SIZE = 10000;
-const DEFAULT_PAUSE_DURATION = 2000;
-
-const pause = async (duration) => {
-  return new Promise((resolve) => {
-    setTimeout(resolve, duration);
-  });
-};
-
-function getEmptyParticipationKnowlegdeElementSnapshotIds(firstId, size = DEFAULT_CHUNK_SIZE) {
-  return knex('knowledge-element-snapshots')
-    .whereNull('campaignParticipationId')
-    .where('id', '>=', firstId)
-    .orderBy('id', 'asc')
-    .pluck('id')
-    .limit(size);
-}
-
-// Définition du script
-export class PopulateCampaignParticipationIdScript extends Script {
-  constructor() {
-    super({
-      description:
-        'This script will populate the column knowledge-element-snapshots.campaignParticipationId with campaign-participations.id',
-      permanent: false,
-      options: {
-        chunkSize: {
-          type: 'number',
-          default: DEFAULT_CHUNK_SIZE,
-          description: 'number of records to update in one update',
-        },
-        pauseDuration: {
-          type: 'number',
-          default: DEFAULT_PAUSE_DURATION,
-          description: 'Time in ms between each chunk processing',
-        },
-      },
-    });
-  }
-
-  async handle({ options, logger, dependencies = { pause } }) {
-    const result = await knex('knowledge-element-snapshots').count().whereNull('campaignParticipationId').first();
-
-    if (result.count === 0) {
-      logger.info(
-        { event: 'PopulateCampaignParticipationIdScript' },
-        `There is no knowledge-element-snapshot with missing campaignParticipationId. Job done !`,
-      );
-      return;
-    } else {
-      logger.info(
-        { event: 'PopulateCampaignParticipationIdScript' },
-        `Try to populate ${result.count} missing campaignParticipationId`,
-      );
-    }
-
-    let ids = await getEmptyParticipationKnowlegdeElementSnapshotIds(0, options.chunkSize);
-    let totalUddatedRows = 0;
-    while (ids.length > 0) {
-      const updatedRows = await knex('knowledge-element-snapshots')
-        .whereNull('campaignParticipationId')
-        .updateFrom('campaign-participations')
-        .update({
-          campaignParticipationId: knex.ref('campaign-participations.id'),
-        })
-        .where('knowledge-element-snapshots.snappedAt', knex.ref('campaign-participations.sharedAt'))
-        .where('knowledge-element-snapshots.userId', knex.ref('campaign-participations.userId'))
-        .whereIn('knowledge-element-snapshots.id', ids);
-
-      totalUddatedRows += updatedRows;
-      logger.info(
-        { event: 'PopulateCampaignParticipationIdScript' },
-        `loop: ${updatedRows} rows updated from "knwoledge-element-snapshots"`,
-      );
-
-      ids = await getEmptyParticipationKnowlegdeElementSnapshotIds(ids[ids.length - 1] + 1, options.chunkSize);
-      if (ids.length > 0 && options.pauseDuration > 0) {
-        await dependencies.pause(options.pauseDuration);
-      }
-    }
-    logger.info(
-      { event: 'PopulateCampaignParticipationIdScript' },
-      `${totalUddatedRows} rows updated from "knowledge-element-snapshots"`,
-    );
-    let emptyRowResult = await knex('knowledge-element-snapshots').count().whereNull('campaignParticipationId').first();
-    if (emptyRowResult.count === 0) {
-      logger.info(
-        { event: 'PopulateCampaignParticipationIdScript' },
-        `No row with empty campaignParticipationId to update. Job done !`,
-      );
-      return;
-    } else {
-      logger.info(`${emptyRowResult.count} rows with empty campaignParticipationId to update`);
-    }
-    const anonymisedParticipations = await knex('campaign-participations')
-      .select(['campaign-participations.id', 'sharedAt'])
-      .join('campaigns', function () {
-        this.on('campaigns.id', 'campaign-participations.campaignId');
-      })
-      .whereNull('userId')
-      .whereNotNull('sharedAt');
-
-    const emptyKeSnapshotParticipations = await knex('knowledge-element-snapshots')
-      .whereNull('campaignParticipationId')
-      .select(['id', 'snappedAt']);
-
-    logger.info(
-      { event: 'PopulateCampaignParticipationIdScript' },
-      `Try to populate ${emptyKeSnapshotParticipations.length} keSnapshot from ${anonymisedParticipations.length} anonymised participations`,
-    );
-
-    const matchingSnapshotAndParticipations = emptyKeSnapshotParticipations.flatMap(({ id, snappedAt }) => {
-      const participations = anonymisedParticipations.filter(
-        ({ sharedAt }) => snappedAt.toISOString() === sharedAt.toISOString(),
-      );
-      if (participations.length !== 1) {
-        return [];
-      }
-      return [{ keSnapshotId: id, campaignParticipationId: participations[0].id }];
-    });
-
-    await knex.transaction(async (trx) => {
-      for (const row of matchingSnapshotAndParticipations) {
-        await trx('knowledge-element-snapshots')
-          .update({ campaignParticipationId: row.campaignParticipationId })
-          .where({ id: row.keSnapshotId });
-      }
-    });
-
-    logger.info(
-      { event: 'PopulateCampaignParticipationIdScript' },
-      `Populate ${matchingSnapshotAndParticipations.length} anonymised participations`,
-    );
-
-    emptyRowResult = await knex('knowledge-element-snapshots')
-      .select('id')
-      .whereNull('campaignParticipationId')
-      .pluck('id');
-
-    if (emptyRowResult.length === 0) {
-      logger.info(
-        { event: 'PopulateCampaignParticipationIdScript' },
-        `No row with empty campaignParticipationId to update. Job done !`,
-      );
-    } else {
-      logger.info(
-        { event: 'PopulateCampaignParticipationIdScript', ids: emptyRowResult },
-        `${emptyRowResult.length} rows with empty campaignParticipationId to update`,
-      );
-    }
-  }
-}
-
-// Exécution du script
-await ScriptRunner.execute(import.meta.url, PopulateCampaignParticipationIdScript);
diff --git a/api/src/prescription/campaign-participation/infrastructure/repositories/campaign-participation-repository.js b/api/src/prescription/campaign-participation/infrastructure/repositories/campaign-participation-repository.js
index f527caf84dc..b32ab852fab 100644
--- a/api/src/prescription/campaign-participation/infrastructure/repositories/campaign-participation-repository.js
+++ b/api/src/prescription/campaign-participation/infrastructure/repositories/campaign-participation-repository.js
@@ -38,8 +38,6 @@ const updateWithSnapshot = async function (campaignParticipation) {
     limitDate: campaignParticipation.sharedAt,
   });
   await knowledgeElementSnapshotRepository.save({
-    userId: campaignParticipation.userId,
-    snappedAt: campaignParticipation.sharedAt,
     snapshot: new KnowledgeElementCollection(knowledgeElements).toSnapshot(),
     campaignParticipationId: campaignParticipation.id,
   });
diff --git a/api/src/prescription/campaign/application/api/knowledge-element-snapshots-api.js b/api/src/prescription/campaign/application/api/knowledge-element-snapshots-api.js
index d4a15411906..5b5c13e004b 100644
--- a/api/src/prescription/campaign/application/api/knowledge-element-snapshots-api.js
+++ b/api/src/prescription/campaign/application/api/knowledge-element-snapshots-api.js
@@ -22,8 +22,6 @@ import { KnowledgeElementSnapshot } from './models/KnowledgeElementSnapshot.js';
  */
 export async function save(knowledgeElementSnapshotPayload) {
   await usecases.saveKnowledgeElementSnapshotForParticipation({
-    userId: knowledgeElementSnapshotPayload.userId,
-    snappedAt: new Date(),
     knowledgeElementCollection: new KnowledgeElementCollection(knowledgeElementSnapshotPayload.knowledgeElements),
     campaignParticipationId: knowledgeElementSnapshotPayload.campaignParticipationId,
   });
diff --git a/api/src/prescription/campaign/domain/usecases/save-knowledge-element-snapshot-for-participation.js b/api/src/prescription/campaign/domain/usecases/save-knowledge-element-snapshot-for-participation.js
index 861b68a5910..47b5831a369 100644
--- a/api/src/prescription/campaign/domain/usecases/save-knowledge-element-snapshot-for-participation.js
+++ b/api/src/prescription/campaign/domain/usecases/save-knowledge-element-snapshot-for-participation.js
@@ -1,15 +1,11 @@
 import { withTransaction } from '../../../../shared/domain/DomainTransaction.js';
 
 export const saveKnowledgeElementSnapshotForParticipation = withTransaction(async function ({
-  userId,
-  snappedAt,
   knowledgeElementCollection,
   campaignParticipationId,
   knowledgeElementSnapshotRepository,
 }) {
   await knowledgeElementSnapshotRepository.save({
-    userId,
-    snappedAt,
     snapshot: knowledgeElementCollection.toSnapshot(),
     campaignParticipationId,
   });
diff --git a/api/src/prescription/campaign/infrastructure/repositories/knowledge-element-snapshot-repository.js b/api/src/prescription/campaign/infrastructure/repositories/knowledge-element-snapshot-repository.js
index 49b5a71078d..802cf1727d5 100644
--- a/api/src/prescription/campaign/infrastructure/repositories/knowledge-element-snapshot-repository.js
+++ b/api/src/prescription/campaign/infrastructure/repositories/knowledge-element-snapshot-repository.js
@@ -2,7 +2,7 @@ import { DomainTransaction } from '../../../../shared/domain/DomainTransaction.j
 import { KnowledgeElement } from '../../../../shared/domain/models/KnowledgeElement.js';
 import { CampaignParticipationKnowledgeElementSnapshots } from '../../../shared/domain/read-models/CampaignParticipationKnowledgeElementSnapshots.js';
 
-export async function save({ userId, snappedAt, snapshot, campaignParticipationId }) {
+export async function save({ snapshot, campaignParticipationId }) {
   const knexConn = DomainTransaction.getConnection();
   const existingSnapshot = await knexConn
     .select('id')
@@ -12,15 +12,11 @@ export async function save({ userId, snappedAt, snapshot, campaignParticipationI
   if (existingSnapshot) {
     return await knexConn('knowledge-element-snapshots')
       .update({
-        userId,
-        snappedAt,
         snapshot,
       })
       .where('campaignParticipationId', campaignParticipationId);
   } else {
     return await knexConn('knowledge-element-snapshots').insert({
-      userId,
-      snappedAt,
       snapshot,
       campaignParticipationId,
     });
diff --git a/api/src/prescription/scripts/add-missing-knowledge-element-snapshots.js b/api/src/prescription/scripts/add-missing-knowledge-element-snapshots.js
index 6563fdac7b7..24847b17506 100644
--- a/api/src/prescription/scripts/add-missing-knowledge-element-snapshots.js
+++ b/api/src/prescription/scripts/add-missing-knowledge-element-snapshots.js
@@ -69,8 +69,6 @@ class AddMissingKnowledgeElementSnapshots extends Script {
         limitDate: participation.sharedAt,
       });
       await knowledgeElementSnapshotRepository.save({
-        userId: participation.userId,
-        snappedAt: participation.sharedAt,
         snapshot: new KnowledgeElementCollection(knowledgeElements).toSnapshot(),
         campaignParticipationId,
       });
diff --git a/api/tests/evaluation/integration/domain/usecases/get-next-challenge-for-campaign-assessment_test.js b/api/tests/evaluation/integration/domain/usecases/get-next-challenge-for-campaign-assessment_test.js
index efd91e049e5..489ead07a1e 100644
--- a/api/tests/evaluation/integration/domain/usecases/get-next-challenge-for-campaign-assessment_test.js
+++ b/api/tests/evaluation/integration/domain/usecases/get-next-challenge-for-campaign-assessment_test.js
@@ -133,8 +133,6 @@ describe('Evaluation | Integration | Domain | Use Cases | get-next-challenge-for
       });
       const knowledgeElementsBefore = new KnowledgeElementCollection([knowledgeElement]);
       databaseBuilder.factory.buildKnowledgeElementSnapshot({
-        userId,
-        snappedAt: new Date('2019-01-01'),
         campaignParticipationId,
         snapshot: knowledgeElementsBefore.toSnapshot(),
       });
diff --git a/api/tests/evaluation/integration/domain/usecases/handle-badge-acquisition_test.js b/api/tests/evaluation/integration/domain/usecases/handle-badge-acquisition_test.js
index 378048f66e0..b17e18cab2e 100644
--- a/api/tests/evaluation/integration/domain/usecases/handle-badge-acquisition_test.js
+++ b/api/tests/evaluation/integration/domain/usecases/handle-badge-acquisition_test.js
@@ -168,8 +168,6 @@ describe('Integration | Usecase | Handle Badge Acquisition', function () {
       });
       const knowledgeElementsBefore = new KnowledgeElementCollection([ke1, ke2]);
       databaseBuilder.factory.buildKnowledgeElementSnapshot({
-        userId,
-        snappedAt: new Date(),
         campaignParticipationId,
         snapshot: knowledgeElementsBefore.toSnapshot(),
       });
diff --git a/api/tests/evaluation/integration/domain/usecases/handle-stage-acquisition_test.js b/api/tests/evaluation/integration/domain/usecases/handle-stage-acquisition_test.js
index d8f3c5b523c..968d87ce4c4 100644
--- a/api/tests/evaluation/integration/domain/usecases/handle-stage-acquisition_test.js
+++ b/api/tests/evaluation/integration/domain/usecases/handle-stage-acquisition_test.js
@@ -305,8 +305,6 @@ describe('Evaluation | Integration | Usecase | Handle Stage Acquisition', functi
             domainBuilder.buildKnowledgeElement({ userId, skillId: 'web4', status: 'invalidated' }),
           ];
           databaseBuilder.factory.buildKnowledgeElementSnapshot({
-            userId,
-            snappedAt: new Date(),
             snapshot: new KnowledgeElementCollection(knowledgeElements).toSnapshot(),
             campaignParticipationId,
           });
@@ -449,8 +447,6 @@ describe('Evaluation | Integration | Usecase | Handle Stage Acquisition', functi
             domainBuilder.buildKnowledgeElement({ userId, skillId: 'web4', status: 'invalidated' }),
           ];
           databaseBuilder.factory.buildKnowledgeElementSnapshot({
-            userId,
-            snappedAt: new Date(),
             snapshot: new KnowledgeElementCollection(knowledgeElements).toSnapshot(),
             campaignParticipationId,
           });
diff --git a/api/tests/evaluation/integration/domain/usecases/save-and-correct-answer-for-campaign_test.js b/api/tests/evaluation/integration/domain/usecases/save-and-correct-answer-for-campaign_test.js
index e321ad02bec..772fa85a857 100644
--- a/api/tests/evaluation/integration/domain/usecases/save-and-correct-answer-for-campaign_test.js
+++ b/api/tests/evaluation/integration/domain/usecases/save-and-correct-answer-for-campaign_test.js
@@ -207,8 +207,6 @@ describe('Evaluation | Integration | Usecase | Save and correct answer for campa
       });
       const knowledgeElementsBefore = new KnowledgeElementCollection([knowledgeElement]);
       databaseBuilder.factory.buildKnowledgeElementSnapshot({
-        userId,
-        snappedAt: new Date('2019-01-01'),
         campaignParticipationId,
         snapshot: knowledgeElementsBefore.toSnapshot(),
       });
diff --git a/api/tests/integration/scripts/prod/clean-ke-snapshots_test.js b/api/tests/integration/scripts/prod/clean-ke-snapshots_test.js
index 02e0ef2df4b..2df43f59d80 100644
--- a/api/tests/integration/scripts/prod/clean-ke-snapshots_test.js
+++ b/api/tests/integration/scripts/prod/clean-ke-snapshots_test.js
@@ -65,23 +65,20 @@ describe('Script | Prod | Clean knowledge-element-snapshot snapshot (jsonb)', fu
 
       databaseBuilder.factory.knowledgeElementSnapshotFactory.buildSnapshot({
         id: 1,
-        userId: user.id,
-        snappedAt: participation.sharedAt,
         knowledgeElementsAttributes: [{ skillId: 'skill_1', status: 'validated', earnedPix: 40, userId: user.id }],
+        campaignParticipationId: participation.id,
       });
       databaseBuilder.factory.knowledgeElementSnapshotFactory.buildSnapshot({
         id: 2,
-        userId: user.id,
-        snappedAt: participation2.sharedAt,
         knowledgeElementsAttributes: [{ skillId: 'skill_2', status: 'validated', earnedPix: 40, userId: user.id }],
+        campaignParticipationId: participation2.id,
       });
       databaseBuilder.factory.knowledgeElementSnapshotFactory.buildSnapshot({
         id: 3,
-        userId: user.id,
-        snappedAt: participation3.sharedAt,
         knowledgeElementsAttributes: [
           { skillId: 'skill_2', status: 'validated', earnedPix: 40, userId: null, assessmentId: null, answerId: null },
         ],
+        campaignParticipationId: participation3.id,
       });
 
       await databaseBuilder.commit();
diff --git a/api/tests/integration/scripts/prod/compute-participation-results_test.js b/api/tests/integration/scripts/prod/compute-participation-results_test.js
index 0fc9f3d7ba7..3967049257e 100644
--- a/api/tests/integration/scripts/prod/compute-participation-results_test.js
+++ b/api/tests/integration/scripts/prod/compute-participation-results_test.js
@@ -250,8 +250,6 @@ function _buildParticipationWithSnapshot(participationAttributes, knowledgeEleme
   const participation = databaseBuilder.factory.buildCampaignParticipation(participationAttributes);
 
   databaseBuilder.factory.knowledgeElementSnapshotFactory.buildSnapshot({
-    userId: participation.userId,
-    snappedAt: participation.sharedAt,
     knowledgeElementsAttributes,
     campaignParticipationId: participation.id,
   });
diff --git a/api/tests/integration/scripts/prod/generate-knowledge-element-snapshots-for-campaigns_test.js b/api/tests/integration/scripts/prod/generate-knowledge-element-snapshots-for-campaigns_test.js
index c413e26d9f8..094307a22f9 100644
--- a/api/tests/integration/scripts/prod/generate-knowledge-element-snapshots-for-campaigns_test.js
+++ b/api/tests/integration/scripts/prod/generate-knowledge-element-snapshots-for-campaigns_test.js
@@ -31,7 +31,9 @@ describe('Integration | Scripts | generate-knowledge-element-snapshots-for-campa
         sharedAt: new Date('2020-01-01'),
         userId,
       });
-      databaseBuilder.factory.buildKnowledgeElementSnapshot({ snappedAt: campaignParticipation.sharedAt, userId });
+      databaseBuilder.factory.buildKnowledgeElementSnapshot({
+        campaignParticipationId: campaignParticipation.id,
+      });
       await databaseBuilder.commit();
 
       // when
@@ -71,10 +73,23 @@ describe('Integration | Scripts | generate-knowledge-element-snapshots-for-campa
         sharedAt: new Date('2020-01-01'),
         userId,
       });
-      databaseBuilder.factory.buildCampaignParticipation({ sharedAt: new Date('2020-02-01'), userId });
-      databaseBuilder.factory.buildCampaignParticipation({ sharedAt: new Date('2020-03-01'), userId });
-      databaseBuilder.factory.buildKnowledgeElementSnapshot({ snappedAt: new Date('2020-02-01'), userId });
-      databaseBuilder.factory.buildKnowledgeElementSnapshot({ snappedAt: new Date('2020-03-01'), userId });
+
+      const firstCampaignParticiationId = databaseBuilder.factory.buildCampaignParticipation({
+        sharedAt: new Date('2020-02-01'),
+        userId,
+      }).id;
+      const secondCampaignParticiationId = databaseBuilder.factory.buildCampaignParticipation({
+        sharedAt: new Date('2020-03-01'),
+        userId,
+      }).id;
+      databaseBuilder.factory.buildKnowledgeElementSnapshot({
+        snappedAt: new Date('2020-02-01'),
+        campaignParticipationId: firstCampaignParticiationId,
+      });
+      databaseBuilder.factory.buildKnowledgeElementSnapshot({
+        snappedAt: new Date('2020-03-01'),
+        campaignParticipationId: secondCampaignParticiationId,
+      });
       await databaseBuilder.commit();
 
       // when
@@ -152,8 +167,6 @@ describe('Integration | Scripts | generate-knowledge-element-snapshots-for-campa
 
       // then
       expect(knowledgeElementSnapshotRepositoryStub.save).to.have.been.calledWithExactly({
-        userId: campaignParticipationData[0].userId,
-        snappedAt: campaignParticipationData[0].sharedAt,
         snapshot: new KnowledgeElementCollection(expectedKnowledgeElements).toSnapshot(),
         campaignParticipationId: campaignParticipationData[0].id,
       });
diff --git a/api/tests/integration/scripts/prod/populate-campaign-participation-id-in-knowledge-element-snapshot_test.js b/api/tests/integration/scripts/prod/populate-campaign-participation-id-in-knowledge-element-snapshot_test.js
deleted file mode 100644
index eb6d0b5fd9e..00000000000
--- a/api/tests/integration/scripts/prod/populate-campaign-participation-id-in-knowledge-element-snapshot_test.js
+++ /dev/null
@@ -1,232 +0,0 @@
-import { PopulateCampaignParticipationIdScript } from '../../../../scripts/prod/populate-campaign-participation-id-in-knowledge-element-snapshot.js';
-import { CampaignTypes } from '../../../../src/prescription/shared/domain/constants.js';
-import { databaseBuilder, expect, knex, sinon } from '../../../test-helper.js';
-
-describe('Script | Prod | Delete Organization Learners From Organization', function () {
-  describe('Options', function () {
-    it('has the correct options', function () {
-      // when
-      const script = new PopulateCampaignParticipationIdScript();
-      const { options } = script.metaInfo;
-
-      // then
-      expect(options.chunkSize).to.deep.include({
-        type: 'number',
-        default: 10000,
-        description: 'number of records to update in one update',
-      });
-      expect(options.pauseDuration).to.deep.include({
-        type: 'number',
-        default: 2000,
-        description: 'Time in ms between each chunk processing',
-      });
-    });
-  });
-
-  describe('Handle', function () {
-    let script;
-    let logger;
-    let dependencies;
-    let user, learner, campaign, otherCampaign;
-
-    beforeEach(async function () {
-      script = new PopulateCampaignParticipationIdScript();
-      logger = { info: sinon.spy(), error: sinon.spy(), debug: sinon.spy() };
-      dependencies = { pause: sinon.stub() };
-
-      user = databaseBuilder.factory.buildUser({ id: 123, firstName: 'Sam', lastName: 'Sagace' });
-      learner = databaseBuilder.factory.buildOrganizationLearner({
-        userId: user.id,
-      });
-
-      campaign = databaseBuilder.factory.buildCampaign({ type: CampaignTypes.PROFILES_COLLECTION });
-      otherCampaign = databaseBuilder.factory.buildCampaign();
-      await databaseBuilder.commit();
-    });
-
-    describe('no participation', function () {
-      it('should end early if there no participation to update', async function () {
-        // when
-        await script.handle({ options: { chunkSize: 1, pauseDuration: 0 }, logger, dependencies });
-
-        // then
-        expect(logger.info).to.have.been.calledWithExactly(
-          { event: 'PopulateCampaignParticipationIdScript' },
-          'There is no knowledge-element-snapshot with missing campaignParticipationId. Job done !',
-        );
-      });
-    });
-
-    describe('linked participation', function () {
-      beforeEach(async function () {
-        // given
-        const participation = databaseBuilder.factory.buildCampaignParticipation({
-          organizationLearnerId: learner.id,
-          userId: user.id,
-          campaign: campaign.id,
-          participantExternalId: null,
-          createdAt: new Date('2024-12-15'),
-          sharedAt: new Date('2024-12-16'),
-        });
-        databaseBuilder.factory.knowledgeElementSnapshotFactory.buildSnapshot({
-          id: 1,
-          userId: user.id,
-          snappedAt: participation.sharedAt,
-          knowledgeElementsAttributes: [{ skillId: 'skill_1', status: 'validated', earnedPix: 40 }],
-        });
-        const otherParticipation = databaseBuilder.factory.buildCampaignParticipation({
-          organizationLearnerId: learner.id,
-          userId: user.id,
-          campaign: otherCampaign.id,
-          participantExternalId: null,
-          createdAt: new Date('2024-05-09'),
-          sharedAt: new Date('2024-05-12'),
-        });
-        databaseBuilder.factory.knowledgeElementSnapshotFactory.buildSnapshot({
-          id: 2,
-          userId: user.id,
-          snappedAt: otherParticipation.sharedAt,
-          knowledgeElementsAttributes: [{ skillId: 'skill_1', status: 'validated', earnedPix: 40 }],
-        });
-        await databaseBuilder.commit();
-      });
-
-      it('log how many entries will be updated', async function () {
-        // when
-        await script.handle({ options: { chunkSize: 1, pauseDuration: 0 }, logger, dependencies });
-
-        // then
-        expect(
-          logger.info.calledWithExactly(
-            { event: 'PopulateCampaignParticipationIdScript' },
-            'Try to populate 2 missing campaignParticipationId',
-          ),
-        ).to.be.true;
-      });
-
-      it('populate empty participations one by one', async function () {
-        // when
-        await script.handle({ options: { chunkSize: 1, pauseDuration: 0 }, logger, dependencies });
-
-        // then
-        const emptyKeSnapshots = await knex('knowledge-element-snapshots')
-          .whereNull('campaignParticipationId')
-          .count()
-          .first();
-        expect(emptyKeSnapshots.count).to.equals(0);
-        expect(logger.info).to.have.been.calledWith(
-          { event: 'PopulateCampaignParticipationIdScript' },
-          `2 rows updated from "knowledge-element-snapshots"`,
-        );
-        expect(logger.info).to.have.been.calledWith(
-          { event: 'PopulateCampaignParticipationIdScript' },
-          'No row with empty campaignParticipationId to update. Job done !',
-        );
-      });
-
-      it('populate empty participations using a chunk of 1000', async function () {
-        // when
-        await script.handle({ options: { chunkSize: 1000, pauseDuration: 0 }, logger, dependencies });
-
-        // then
-        const emptyKeSnapshots = await knex('knowledge-element-snapshots')
-          .whereNull('campaignParticipationId')
-          .count()
-          .first();
-        expect(emptyKeSnapshots.count).to.equals(0);
-        expect(logger.info).to.have.been.calledWith(
-          { event: 'PopulateCampaignParticipationIdScript' },
-          `2 rows updated from "knowledge-element-snapshots"`,
-        );
-        expect(dependencies.pause.called).to.be.false;
-        expect(logger.info).to.have.been.calledWith(
-          { event: 'PopulateCampaignParticipationIdScript' },
-          'No row with empty campaignParticipationId to update. Job done !',
-        );
-      });
-
-      it('should pause between chunk of 1', async function () {
-        // given
-        dependencies.pause.resolves();
-
-        // when
-        await script.handle({ options: { chunkSize: 1, pauseDuration: 10 }, logger, dependencies });
-        const emptyKeSnapshots = await knex('knowledge-element-snapshots')
-          .whereNull('campaignParticipationId')
-          .count()
-          .first();
-
-        // then
-        expect(emptyKeSnapshots.count).to.equals(0);
-        expect(dependencies.pause).to.have.been.calledOnce;
-        expect(dependencies.pause).to.have.been.calledWith(10);
-      });
-    });
-
-    describe('anonymised participations', function () {
-      it('should populate matching unique participation and snapshot', async function () {
-        // given
-        const participation = databaseBuilder.factory.buildCampaignParticipation({
-          organizationLearnerId: learner.id,
-          userId: null,
-          campaign: campaign.id,
-          participantExternalId: null,
-          createdAt: new Date('2024-12-15'),
-          sharedAt: new Date('2014-12-16'),
-        });
-
-        databaseBuilder.factory.knowledgeElementSnapshotFactory.buildSnapshot({
-          userId: user.id,
-          snappedAt: participation.sharedAt,
-          knowledgeElementsAttributes: [{ skillId: 'skill_1', status: 'validated', earnedPix: 40 }],
-        });
-        await databaseBuilder.commit();
-
-        // when
-        await script.handle({ options: { chunkSize: 1000, pauseDuration: 0 }, logger, dependencies });
-
-        // then
-        const matchingSnapshot = await knex('knowledge-element-snapshots')
-          .where('snappedAt', participation.sharedAt)
-          .first();
-        expect(matchingSnapshot.campaignParticipationId).to.equals(participation.id);
-      });
-
-      it('should not populate when matching multiple participations and snapshot', async function () {
-        // given
-        const participation = databaseBuilder.factory.buildCampaignParticipation({
-          organizationLearnerId: learner.id,
-          userId: null,
-          campaign: campaign.id,
-          participantExternalId: null,
-          createdAt: new Date('2024-12-15'),
-          sharedAt: new Date('2014-12-16'),
-        });
-        databaseBuilder.factory.buildCampaignParticipation({
-          userId: null,
-          participantExternalId: null,
-          createdAt: new Date('2024-12-15'),
-          sharedAt: participation.sharedAt,
-        });
-
-        databaseBuilder.factory.knowledgeElementSnapshotFactory.buildSnapshot({
-          userId: user.id,
-          snappedAt: participation.sharedAt,
-          knowledgeElementsAttributes: [{ skillId: 'skill_1', status: 'validated', earnedPix: 40 }],
-        });
-        await databaseBuilder.commit();
-
-        // when
-        await script.handle({ options: { chunkSize: 1000, pauseDuration: 0 }, logger, dependencies });
-
-        //then
-        const emptyKeSnapshots = await knex('knowledge-element-snapshots')
-          .whereNull('campaignParticipationId')
-          .count()
-          .first();
-
-        expect(emptyKeSnapshots.count).to.equals(1);
-      });
-    });
-  });
-});
diff --git a/api/tests/prescription/campaign-participation/acceptance/application/campaign-participation-route_test.js b/api/tests/prescription/campaign-participation/acceptance/application/campaign-participation-route_test.js
index eb3d519c6f9..ad9e8cc895f 100644
--- a/api/tests/prescription/campaign-participation/acceptance/application/campaign-participation-route_test.js
+++ b/api/tests/prescription/campaign-participation/acceptance/application/campaign-participation-route_test.js
@@ -114,10 +114,8 @@ describe('Acceptance | API | Campaign Participations', function () {
       });
 
       databaseBuilder.factory.buildKnowledgeElementSnapshot({
-        userId,
         snapshot: JSON.stringify([]),
         campaignParticipationId: campaignParticipation.id,
-        snappedAt: sharedAt,
       });
 
       await databaseBuilder.commit();
diff --git a/api/tests/prescription/campaign-participation/integration/domain/usecases/get-user-campaign-assessment-result_test.js b/api/tests/prescription/campaign-participation/integration/domain/usecases/get-user-campaign-assessment-result_test.js
index 9e4115d54e0..6f866ff240f 100644
--- a/api/tests/prescription/campaign-participation/integration/domain/usecases/get-user-campaign-assessment-result_test.js
+++ b/api/tests/prescription/campaign-participation/integration/domain/usecases/get-user-campaign-assessment-result_test.js
@@ -134,8 +134,6 @@ describe('Prescription Integration | UseCase | get-user-campaign-assessment-resu
       });
       const knowledgeElementsBefore = new KnowledgeElementCollection(domainKEs);
       databaseBuilder.factory.buildKnowledgeElementSnapshot({
-        userId,
-        snappedAt: new Date('2019-01-01'),
         campaignParticipationId,
         snapshot: knowledgeElementsBefore.toSnapshot(),
       });
diff --git a/api/tests/prescription/campaign-participation/integration/infrastructure/repositories/campaign-analysis-repository_test.js b/api/tests/prescription/campaign-participation/integration/infrastructure/repositories/campaign-analysis-repository_test.js
index 6728cef3167..c7dec1c4ee0 100644
--- a/api/tests/prescription/campaign-participation/integration/infrastructure/repositories/campaign-analysis-repository_test.js
+++ b/api/tests/prescription/campaign-participation/integration/infrastructure/repositories/campaign-analysis-repository_test.js
@@ -312,9 +312,7 @@ describe('Integration | Repository | Campaign analysis repository', function ()
 
           [userWithCampaignParticipationFred, userWithCampaignParticipationJoe].forEach((participation) => {
             databaseBuilder.factory.buildKnowledgeElementSnapshot({
-              userId: participation.userId,
               campaignParticipationId: participation.campaignParticipation.id,
-              snappedAt: participation.campaignParticipation.sharedAt,
               snapshot: JSON.stringify(
                 knowledgeElements.filter(
                   ({ userId, createdAt }) => userId === participation.userId && createdAt <= shareDate,
@@ -396,9 +394,7 @@ describe('Integration | Repository | Campaign analysis repository', function ()
           ];
           const knowledgeElements = keData.map(databaseBuilder.factory.buildKnowledgeElement);
           databaseBuilder.factory.buildKnowledgeElementSnapshot({
-            userId: userWithCampaignParticipationFred.userId,
             campaignParticipationId: userWithCampaignParticipationFred.campaignParticipation.id,
-            snappedAt: userWithCampaignParticipationFred.campaignParticipation.sharedAt,
             snapshot: JSON.stringify(knowledgeElements.filter(({ createdAt }) => createdAt <= shareDate)),
           });
           return databaseBuilder.commit();
diff --git a/api/tests/prescription/campaign-participation/integration/infrastructure/repositories/campaign-participation-repository_test.js b/api/tests/prescription/campaign-participation/integration/infrastructure/repositories/campaign-participation-repository_test.js
index 27eff471ebd..7be90c997a4 100644
--- a/api/tests/prescription/campaign-participation/integration/infrastructure/repositories/campaign-participation-repository_test.js
+++ b/api/tests/prescription/campaign-participation/integration/infrastructure/repositories/campaign-participation-repository_test.js
@@ -155,8 +155,6 @@ describe('Integration | Repository | Campaign Participation', function () {
         });
         const knowledgeElementsBefore = new KnowledgeElementCollection([knowledgeElement1, knowledgeElement2]);
         databaseBuilder.factory.buildKnowledgeElementSnapshot({
-          userId,
-          snappedAt: new Date('2019-01-01'),
           campaignParticipationId: campaignParticipation.id,
           snapshot: knowledgeElementsBefore.toSnapshot(),
         });
diff --git a/api/tests/prescription/campaign-participation/integration/infrastructure/repositories/campaign-participation-result-repository_test.js b/api/tests/prescription/campaign-participation/integration/infrastructure/repositories/campaign-participation-result-repository_test.js
index 83c25c05ad8..e01a79fda20 100644
--- a/api/tests/prescription/campaign-participation/integration/infrastructure/repositories/campaign-participation-result-repository_test.js
+++ b/api/tests/prescription/campaign-participation/integration/infrastructure/repositories/campaign-participation-result-repository_test.js
@@ -131,8 +131,6 @@ describe('Integration | Repository | Campaign Participation Result', function ()
         },
       ];
       databaseBuilder.factory.knowledgeElementSnapshotFactory.buildSnapshot({
-        userId,
-        snappedAt: new Date('2020-01-02'),
         knowledgeElementsAttributes,
         campaignParticipationId,
       });
@@ -193,8 +191,6 @@ describe('Integration | Repository | Campaign Participation Result', function ()
       ];
 
       databaseBuilder.factory.knowledgeElementSnapshotFactory.buildSnapshot({
-        userId,
-        snappedAt: new Date('2020-01-02'),
         knowledgeElementsAttributes,
         campaignParticipationId,
       });
diff --git a/api/tests/prescription/campaign-participation/integration/infrastructure/repositories/campaign-profile-repository_test.js b/api/tests/prescription/campaign-participation/integration/infrastructure/repositories/campaign-profile-repository_test.js
index 625fada2f91..3f72c41e6ba 100644
--- a/api/tests/prescription/campaign-participation/integration/infrastructure/repositories/campaign-profile-repository_test.js
+++ b/api/tests/prescription/campaign-participation/integration/infrastructure/repositories/campaign-profile-repository_test.js
@@ -211,7 +211,6 @@ describe('Integration | Repository | CampaignProfileRepository', function () {
         });
 
         databaseBuilder.factory.buildKnowledgeElementSnapshot({
-          snappedAt: new Date('2020-01-02'),
           snapshot: JSON.stringify([ke]),
           campaignParticipationId: campaignParticipation.id,
         });
diff --git a/api/tests/prescription/campaign-participation/integration/infrastructure/repositories/participant-result-repository_test.js b/api/tests/prescription/campaign-participation/integration/infrastructure/repositories/participant-result-repository_test.js
index 655356006fc..7d80fd073d9 100644
--- a/api/tests/prescription/campaign-participation/integration/infrastructure/repositories/participant-result-repository_test.js
+++ b/api/tests/prescription/campaign-participation/integration/infrastructure/repositories/participant-result-repository_test.js
@@ -1130,8 +1130,6 @@ describe('Integration | Repository | ParticipantResultRepository', function () {
         ];
         const knowledgeElementsInSnapshot = new KnowledgeElementCollection(knowledgeElements);
         databaseBuilder.factory.buildKnowledgeElementSnapshot({
-          userId,
-          snappedAt: new Date(),
           campaignParticipationId,
           snapshot: knowledgeElementsInSnapshot.toSnapshot(),
         });
@@ -1179,8 +1177,6 @@ describe('Integration | Repository | ParticipantResultRepository', function () {
         ];
         const knowledgeElementsInSnapshot = new KnowledgeElementCollection(knowledgeElements);
         databaseBuilder.factory.buildKnowledgeElementSnapshot({
-          userId,
-          snappedAt: new Date(),
           campaignParticipationId,
           snapshot: knowledgeElementsInSnapshot.toSnapshot(),
         });
@@ -1246,8 +1242,6 @@ describe('Integration | Repository | ParticipantResultRepository', function () {
           ];
           const knowledgeElementsInSnapshot = new KnowledgeElementCollection(knowledgeElements);
           databaseBuilder.factory.buildKnowledgeElementSnapshot({
-            userId,
-            snappedAt: new Date(),
             campaignParticipationId,
             snapshot: knowledgeElementsInSnapshot.toSnapshot(),
           });
@@ -1469,8 +1463,6 @@ describe('Integration | Repository | ParticipantResultRepository', function () {
             }),
           ]);
           databaseBuilder.factory.buildKnowledgeElementSnapshot({
-            userId,
-            snappedAt: new Date(),
             campaignParticipationId,
             snapshot: knowledgeElementsInSnapshot.toSnapshot(),
           });
diff --git a/api/tests/prescription/campaign-participation/integration/infrastructure/repositories/participant-results-shared-repository_test.js b/api/tests/prescription/campaign-participation/integration/infrastructure/repositories/participant-results-shared-repository_test.js
index 1b3b16709f6..2f614b5cc79 100644
--- a/api/tests/prescription/campaign-participation/integration/infrastructure/repositories/participant-results-shared-repository_test.js
+++ b/api/tests/prescription/campaign-participation/integration/infrastructure/repositories/participant-results-shared-repository_test.js
@@ -362,8 +362,6 @@ function _buildParticipationWithSnapshot(participationAttributes, knowledgeEleme
   const participation = databaseBuilder.factory.buildCampaignParticipation(participationAttributes);
 
   databaseBuilder.factory.knowledgeElementSnapshotFactory.buildSnapshot({
-    userId: participation.userId,
-    snappedAt: participation.sharedAt,
     knowledgeElementsAttributes,
     campaignParticipationId: participation.id,
   });
diff --git a/api/tests/prescription/campaign/acceptance/application/campaign-results-route_test.js b/api/tests/prescription/campaign/acceptance/application/campaign-results-route_test.js
index 76e3e51aa92..1b43afed523 100644
--- a/api/tests/prescription/campaign/acceptance/application/campaign-results-route_test.js
+++ b/api/tests/prescription/campaign/acceptance/application/campaign-results-route_test.js
@@ -576,10 +576,8 @@ describe('Acceptance | API | campaign-results-route', function () {
       });
 
       databaseBuilder.factory.buildKnowledgeElementSnapshot({
-        userId,
         campaignParticipationId: campaignParticipation.id,
         snapshot: new KnowledgeElementCollection([ke]).toSnapshot(),
-        snappedAt: campaignParticipation.sharedAt,
       });
 
       await databaseBuilder.commit();
diff --git a/api/tests/prescription/campaign/integration/domain/usecases/save-knowledge-element-snapshot-for-participation_test.js b/api/tests/prescription/campaign/integration/domain/usecases/save-knowledge-element-snapshot-for-participation_test.js
index 3883a3fc97d..4b60ba5d654 100644
--- a/api/tests/prescription/campaign/integration/domain/usecases/save-knowledge-element-snapshot-for-participation_test.js
+++ b/api/tests/prescription/campaign/integration/domain/usecases/save-knowledge-element-snapshot-for-participation_test.js
@@ -7,13 +7,10 @@ describe('Integration | UseCase | save-knowledge-element-snapshot-for-participat
   it('should persist knowledgeElement', async function () {
     const knowledgeElement = domainBuilder.buildKnowledgeElement();
     const campaignParticipationId = databaseBuilder.factory.buildCampaignParticipation().id;
-    const userId = databaseBuilder.factory.buildUser().id;
     await databaseBuilder.commit();
 
     const knowledgeElementCollection = new KnowledgeElementCollection([knowledgeElement]);
     const result = await usecases.saveKnowledgeElementSnapshotForParticipation({
-      userId,
-      snappedAt: new Date('2025-03-06'),
       campaignParticipationId,
       knowledgeElementCollection,
     });
diff --git a/api/tests/prescription/campaign/integration/domain/usecases/start-writing-campaign-assessment-results-to-stream_test.js b/api/tests/prescription/campaign/integration/domain/usecases/start-writing-campaign-assessment-results-to-stream_test.js
index d0e3ec41088..b75ca0f715a 100644
--- a/api/tests/prescription/campaign/integration/domain/usecases/start-writing-campaign-assessment-results-to-stream_test.js
+++ b/api/tests/prescription/campaign/integration/domain/usecases/start-writing-campaign-assessment-results-to-stream_test.js
@@ -114,20 +114,6 @@ describe('Integration | Domain | Use Cases | start-writing-campaign-assessment-r
               userId: participant.id,
             });
 
-            const ke1 = databaseBuilder.factory.buildKnowledgeElement({
-              status: 'validated',
-              skillId: 'recSkillWeb1',
-              competenceId: 'recCompetence1',
-              userId: participant.id,
-              createdAt,
-            });
-
-            databaseBuilder.factory.buildKnowledgeElementSnapshot({
-              userId: participant.id,
-              snappedAt: sharedAt,
-              snapshot: new KnowledgeElementCollection([ke1]).toSnapshot(),
-            });
-
             ['recSkillWeb1'].forEach((skillId) => {
               databaseBuilder.factory.buildCampaignSkill({
                 campaignId: campaign.id,
@@ -216,8 +202,6 @@ describe('Integration | Domain | Use Cases | start-writing-campaign-assessment-r
               createdAt,
             });
             databaseBuilder.factory.buildKnowledgeElementSnapshot({
-              userId: participant.id,
-              snappedAt: sharedAt,
               campaignParticipationId: campaignParticipation.id,
               snapshot: new KnowledgeElementCollection([ke1, ke2, ke3]).toSnapshot(),
             });
@@ -357,8 +341,6 @@ describe('Integration | Domain | Use Cases | start-writing-campaign-assessment-r
               createdAt,
             });
             databaseBuilder.factory.buildKnowledgeElementSnapshot({
-              userId: participant.id,
-              snappedAt: sharedAt,
               campaignParticipationId: campaignParticipation.id,
               snapshot: new KnowledgeElementCollection([ke1, ke2, ke3]).toSnapshot(),
             });
@@ -468,8 +450,6 @@ describe('Integration | Domain | Use Cases | start-writing-campaign-assessment-r
               createdAt,
             });
             databaseBuilder.factory.buildKnowledgeElementSnapshot({
-              userId: participant.id,
-              snappedAt: sharedAt,
               campaignParticipationId: campaignParticipation.id,
               snapshot: new KnowledgeElementCollection([ke1, ke2, ke3]).toSnapshot(),
             });
@@ -716,8 +696,6 @@ describe('Integration | Domain | Use Cases | start-writing-campaign-assessment-r
             });
 
             databaseBuilder.factory.buildKnowledgeElementSnapshot({
-              userId: participant.id,
-              snappedAt: sharedAt,
               campaignParticipationId: campaignParticipation.id,
               snapshot: new KnowledgeElementCollection([ke1, ke2, ke3]).toSnapshot(),
             });
diff --git a/api/tests/prescription/campaign/integration/domain/usecases/start-writing-campaign-profiles-collection-results-to-stream_test.js b/api/tests/prescription/campaign/integration/domain/usecases/start-writing-campaign-profiles-collection-results-to-stream_test.js
index de7e6157c02..07be40a8986 100644
--- a/api/tests/prescription/campaign/integration/domain/usecases/start-writing-campaign-profiles-collection-results-to-stream_test.js
+++ b/api/tests/prescription/campaign/integration/domain/usecases/start-writing-campaign-profiles-collection-results-to-stream_test.js
@@ -176,8 +176,6 @@ describe('Integration | Domain | Use Cases | start-writing-profiles-collection-c
         });
 
         databaseBuilder.factory.buildKnowledgeElementSnapshot({
-          userId: participationShared.userId,
-          snappedAt: participationShared.sharedAt,
           snapshot: new KnowledgeElementCollection([ke1, ke2, ke3, ke4, ke5]).toSnapshot(),
           campaignParticipationId: participationShared.id,
         });
@@ -249,8 +247,6 @@ describe('Integration | Domain | Use Cases | start-writing-profiles-collection-c
         );
 
         databaseBuilder.factory.buildKnowledgeElementSnapshot({
-          userId: participationShared.userId,
-          snappedAt: participationShared.sharedAt,
           snapshot: new KnowledgeElementCollection([ke1, ke2, ke3, ke4, ke5]).toSnapshot(),
           campaignParticipationId: participationShared.id,
         });
@@ -398,8 +394,6 @@ describe('Integration | Domain | Use Cases | start-writing-profiles-collection-c
         );
 
         databaseBuilder.factory.buildKnowledgeElementSnapshot({
-          userId: participationShared.userId,
-          snappedAt: participationShared.sharedAt,
           snapshot: new KnowledgeElementCollection([ke1, ke2, ke3, ke4, ke5]).toSnapshot(),
           campaignParticipationId: participationShared.id,
         });
@@ -481,8 +475,6 @@ describe('Integration | Domain | Use Cases | start-writing-profiles-collection-c
         });
 
         databaseBuilder.factory.buildKnowledgeElementSnapshot({
-          userId: participationShared.userId,
-          snappedAt: participationShared.sharedAt,
           snapshot: new KnowledgeElementCollection([ke1, ke2, ke3, ke4, ke5]).toSnapshot(),
           campaignParticipationId: participationShared.id,
         });
@@ -567,8 +559,6 @@ describe('Integration | Domain | Use Cases | start-writing-profiles-collection-c
         });
 
         databaseBuilder.factory.buildKnowledgeElementSnapshot({
-          userId: participationShared.userId,
-          snappedAt: participationShared.sharedAt,
           snapshot: new KnowledgeElementCollection([ke1, ke2, ke3, ke4, ke5]).toSnapshot(),
           campaignParticipationId: participationShared.id,
         });
diff --git a/api/tests/prescription/campaign/integration/infrastructure/repositories/campaign-collective-result-repository_test.js b/api/tests/prescription/campaign/integration/infrastructure/repositories/campaign-collective-result-repository_test.js
index 4d866bcddcf..0fcb37fafff 100644
--- a/api/tests/prescription/campaign/integration/infrastructure/repositories/campaign-collective-result-repository_test.js
+++ b/api/tests/prescription/campaign/integration/infrastructure/repositories/campaign-collective-result-repository_test.js
@@ -466,9 +466,7 @@ describe('Integration | Repository | Campaign collective result repository', fun
           ];
 
           databaseBuilder.factory.buildKnowledgeElementSnapshot({
-            userId: fredId,
             campaignParticipationId: userWithCampaignParticipationFred.campaignParticipation.id,
-            snappedAt: userWithCampaignParticipationFred.sharedAt,
             snapshot: new KnowledgeElementCollection(
               knowledgeElements.map(domainBuilder.buildKnowledgeElement),
             ).toSnapshot(),
@@ -889,8 +887,6 @@ describe('Integration | Repository | Campaign collective result repository', fun
           const knowledgeElementsAlice = knowledgeElementsDataAlice.map(databaseBuilder.factory.buildKnowledgeElement);
 
           databaseBuilder.factory.buildKnowledgeElementSnapshot({
-            userId: userWithCampaignParticipationAlice.userId,
-            snappedAt: userWithCampaignParticipationAlice.campaignParticipation.sharedAt,
             snapshot: new KnowledgeElementCollection(
               knowledgeElementsAlice.filter(({ createdAt }) => createdAt <= campaignParticipationShareDate),
             ).toSnapshot(),
@@ -902,8 +898,6 @@ describe('Integration | Repository | Campaign collective result repository', fun
           );
 
           databaseBuilder.factory.buildKnowledgeElementSnapshot({
-            userId: userWithCampaignParticipationCharlie.userId,
-            snappedAt: userWithCampaignParticipationCharlie.campaignParticipation.sharedAt,
             snapshot: new KnowledgeElementCollection(
               knowledgeElementsCharlie.filter(({ createdAt }) => createdAt <= campaignParticipationShareDate),
             ).toSnapshot(),
@@ -913,8 +907,6 @@ describe('Integration | Repository | Campaign collective result repository', fun
           const knowledgeElementsBob = knowledgeElementsDataBob.map(databaseBuilder.factory.buildKnowledgeElement);
 
           databaseBuilder.factory.buildKnowledgeElementSnapshot({
-            userId: userWithCampaignParticipationBob.userId,
-            snappedAt: userWithCampaignParticipationBob.campaignParticipation.sharedAt,
             snapshot: new KnowledgeElementCollection(
               knowledgeElementsBob.filter(({ createdAt }) => createdAt <= campaignParticipationShareDate),
             ).toSnapshot(),
@@ -926,8 +918,6 @@ describe('Integration | Repository | Campaign collective result repository', fun
           const knowledgeElementsElo = knowledgeElementsDataElo.map(databaseBuilder.factory.buildKnowledgeElement);
 
           databaseBuilder.factory.buildKnowledgeElementSnapshot({
-            userId: userWithCampaignParticipationElo.userId,
-            snappedAt: userWithCampaignParticipationElo.campaignParticipation.sharedAt,
             snapshot: new KnowledgeElementCollection(
               knowledgeElementsElo.filter(({ createdAt }) => createdAt <= campaignParticipationShareDate),
             ).toSnapshot(),
@@ -982,8 +972,6 @@ describe('Integration | Repository | Campaign collective result repository', fun
           });
 
           databaseBuilder.factory.buildKnowledgeElementSnapshot({
-            userId: userId,
-            snappedAt: campaignParticipation.sharedAt,
             snapshot: new KnowledgeElementCollection([knowledgeElement]).toSnapshot(),
             campaignParticipationId: campaignParticipation.id,
           });
@@ -1071,15 +1059,11 @@ describe('Integration | Repository | Campaign collective result repository', fun
           const knowledgeElementsBob = knowledgeElementsDataBob.map(databaseBuilder.factory.buildKnowledgeElement);
 
           databaseBuilder.factory.buildKnowledgeElementSnapshot({
-            userId: userWithCampaignParticipationAlice.userId,
-            snappedAt: userWithCampaignParticipationAlice.campaignParticipation.sharedAt,
             snapshot: new KnowledgeElementCollection(knowledgeElementsAlice).toSnapshot(),
             campaignParticipationId: userWithCampaignParticipationAlice.campaignParticipation.id,
           });
 
           databaseBuilder.factory.buildKnowledgeElementSnapshot({
-            userId: userWithCampaignParticipationBob.userId,
-            snappedAt: userWithCampaignParticipationBob.campaignParticipation.sharedAt,
             snapshot: new KnowledgeElementCollection(knowledgeElementsBob).toSnapshot(),
             campaignParticipationId: userWithCampaignParticipationBob.campaignParticipation.id,
           });
diff --git a/api/tests/prescription/campaign/integration/infrastructure/repositories/campaign-profiles-collection-participation-summary-repository_test.js b/api/tests/prescription/campaign/integration/infrastructure/repositories/campaign-profiles-collection-participation-summary-repository_test.js
index 8ec05190e25..7606db5a183 100644
--- a/api/tests/prescription/campaign/integration/infrastructure/repositories/campaign-profiles-collection-participation-summary-repository_test.js
+++ b/api/tests/prescription/campaign/integration/infrastructure/repositories/campaign-profiles-collection-participation-summary-repository_test.js
@@ -170,8 +170,6 @@ describe('Integration | Repository | Campaign Profiles Collection Participation
         });
 
         databaseBuilder.factory.buildKnowledgeElementSnapshot({
-          userId: campaignParticipation.userId,
-          snappedAt: campaignParticipation.sharedAt,
           campaignParticipationId: campaignParticipation.id,
           snapshot: new KnowledgeElementCollection([ke1, ke2]).toSnapshot(),
         });
diff --git a/api/tests/prescription/campaign/integration/infrastructure/repositories/knowledge-element-snapshot-repository_test.js b/api/tests/prescription/campaign/integration/infrastructure/repositories/knowledge-element-snapshot-repository_test.js
index 11addf17efc..f6c6bb8d0d9 100644
--- a/api/tests/prescription/campaign/integration/infrastructure/repositories/knowledge-element-snapshot-repository_test.js
+++ b/api/tests/prescription/campaign/integration/infrastructure/repositories/knowledge-element-snapshot-repository_test.js
@@ -7,7 +7,6 @@ describe('Integration | Repository | KnowledgeElementSnapshotRepository', functi
   describe('#save', function () {
     it('should create a new knowledge elements snapshot when no snapshot exist for given campaignParticipationId', async function () {
       // given
-      const snappedAt = new Date('2019-04-01');
       const userId = databaseBuilder.factory.buildUser().id;
       const campaignParticipationId = databaseBuilder.factory.buildCampaignParticipation().id;
       const knowledgeElement1 = databaseBuilder.factory.buildKnowledgeElement({
@@ -23,22 +22,18 @@ describe('Integration | Repository | KnowledgeElementSnapshotRepository', functi
 
       // when
       await knowledgeElementSnapshotRepository.save({
-        userId,
-        snappedAt,
         snapshot: knowledgeElements.toSnapshot(),
         campaignParticipationId,
       });
 
       // then
       const actualUserSnapshot = await knex.select('*').from('knowledge-element-snapshots').first();
-      expect(actualUserSnapshot.userId).to.deep.equal(userId);
-      expect(actualUserSnapshot.snappedAt).to.deep.equal(snappedAt);
+      expect(actualUserSnapshot.campaignParticipationId).to.deep.equal(campaignParticipationId);
       expect(actualUserSnapshot.snapshot).to.deep.equal(JSON.parse(knowledgeElements.toSnapshot()));
     });
 
     it('should update the existing knowledge elements snapshot when snapshot exists for given campaignParticipationId', async function () {
       // given
-      const snappedAt = new Date('2019-04-01');
       const userId = databaseBuilder.factory.buildUser().id;
       const campaignParticipationId = databaseBuilder.factory.buildCampaignParticipation().id;
       const knowledgeElement1 = databaseBuilder.factory.buildKnowledgeElement({
@@ -58,8 +53,6 @@ describe('Integration | Repository | KnowledgeElementSnapshotRepository', functi
       });
       const knowledgeElementsBefore = new KnowledgeElementCollection([knowledgeElement1, knowledgeElement2]);
       databaseBuilder.factory.buildKnowledgeElementSnapshot({
-        userId,
-        snappedAt: new Date('2019-01-01'),
         campaignParticipationId,
         snapshot: knowledgeElementsBefore.toSnapshot(),
       });
@@ -72,22 +65,18 @@ describe('Integration | Repository | KnowledgeElementSnapshotRepository', functi
 
       // when
       await knowledgeElementSnapshotRepository.save({
-        userId,
-        snappedAt,
         snapshot: knowledgeElementsAfter.toSnapshot(),
         campaignParticipationId,
       });
 
       // then
       const actualUserSnapshot = await knex.select('*').from('knowledge-element-snapshots').first();
-      expect(actualUserSnapshot.userId).to.deep.equal(userId);
-      expect(actualUserSnapshot.snappedAt).to.deep.equal(snappedAt);
+      expect(actualUserSnapshot.campaignParticipationId).to.deep.equal(campaignParticipationId);
       expect(actualUserSnapshot.snapshot).to.deep.equal(JSON.parse(knowledgeElementsAfter.toSnapshot()));
     });
 
     context('when a transaction is given transaction', function () {
       it('saves knowledge elements snapshot using a transaction', async function () {
-        const snappedAt = new Date('2019-04-01');
         const userId = databaseBuilder.factory.buildUser().id;
         const campaignParticipationId = databaseBuilder.factory.buildCampaignParticipation().id;
 
@@ -101,20 +90,16 @@ describe('Integration | Repository | KnowledgeElementSnapshotRepository', functi
 
         await DomainTransaction.execute(async () => {
           await knowledgeElementSnapshotRepository.save({
-            userId,
-            snappedAt,
             snapshot: knowledgeElements.toSnapshot(),
             campaignParticipationId,
           });
         });
         const actualUserSnapshot = await knex.select('*').from('knowledge-element-snapshots').first();
-        expect(actualUserSnapshot.userId).to.deep.equal(userId);
-        expect(actualUserSnapshot.snappedAt).to.deep.equal(snappedAt);
+        expect(actualUserSnapshot.campaignParticipationId).to.deep.equal(campaignParticipationId);
         expect(actualUserSnapshot.snapshot).to.deep.equal(JSON.parse(knowledgeElements.toSnapshot()));
       });
 
       it('does not save knowledge elements snapshot using a transaction', async function () {
-        const snappedAt = new Date('2019-04-01');
         const userId = databaseBuilder.factory.buildUser().id;
         const campaignParticipationId = databaseBuilder.factory.buildCampaignParticipation().id;
         const knowledgeElement1 = databaseBuilder.factory.buildKnowledgeElement({
@@ -127,8 +112,6 @@ describe('Integration | Repository | KnowledgeElementSnapshotRepository', functi
         try {
           await DomainTransaction.execute(async () => {
             await knowledgeElementSnapshotRepository.save({
-              userId,
-              snappedAt,
               knowledgeElements,
               campaignParticipationId,
             });
@@ -169,11 +152,8 @@ describe('Integration | Repository | KnowledgeElementSnapshotRepository', functi
 
     it('should return only keys corresponding to existing snapshots', async function () {
       // given
-      const snappedAt1 = new Date('2020-01-02');
       const knowledgeElement1 = databaseBuilder.factory.buildKnowledgeElement({ userId: userId1 });
       databaseBuilder.factory.buildKnowledgeElementSnapshot({
-        userId: userId1,
-        snappedAt: snappedAt1,
         snapshot: new KnowledgeElementCollection([knowledgeElement1]).toSnapshot(),
         campaignParticipationId,
       });
@@ -200,28 +180,20 @@ describe('Integration | Repository | KnowledgeElementSnapshotRepository', functi
 
     it('should find knowledge elements snapshoted grouped by campaignParticipationIds', async function () {
       // given
-      const snappedAt1 = new Date('2020-01-02');
       const knowledgeElement1 = databaseBuilder.factory.buildKnowledgeElement({ userId: userId1 });
       databaseBuilder.factory.buildKnowledgeElementSnapshot({
-        userId: userId1,
-        snappedAt: snappedAt1,
         snapshot: new KnowledgeElementCollection([knowledgeElement1]).toSnapshot(),
         campaignParticipationId,
       });
-      const snappedAt2 = new Date('2020-02-02');
+
       const knowledgeElement2 = databaseBuilder.factory.buildKnowledgeElement({ userId: userId2 });
       databaseBuilder.factory.buildKnowledgeElementSnapshot({
-        userId: userId2,
-        snappedAt: snappedAt2,
         snapshot: new KnowledgeElementCollection([knowledgeElement2]).toSnapshot(),
         campaignParticipationId: secondCampaignParticipationId,
       });
 
-      const snappedAt3 = new Date('2020-02-03');
       const knowledgeElement3 = databaseBuilder.factory.buildKnowledgeElement({ userId: userId2 });
       databaseBuilder.factory.buildKnowledgeElementSnapshot({
-        userId: userId2,
-        snappedAt: snappedAt3,
         snapshot: new KnowledgeElementCollection([knowledgeElement3]).toSnapshot(),
         campaignParticipationId: otherCampaignParticipationId,
       });
@@ -300,8 +272,6 @@ describe('Integration | Repository | KnowledgeElementSnapshotRepository', functi
         skillId: campaignLearningContent.skills[0].id,
       });
       databaseBuilder.factory.buildKnowledgeElementSnapshot({
-        userId: userId1,
-        snappedAt: snappedAt1,
         snapshot: new KnowledgeElementCollection([knowledgeElement1]).toSnapshot(),
         campaignParticipationId: campaignParticipationId1,
       });
@@ -318,8 +288,6 @@ describe('Integration | Repository | KnowledgeElementSnapshotRepository', functi
         skillId: campaignLearningContent.skills[1].id,
       });
       databaseBuilder.factory.buildKnowledgeElementSnapshot({
-        userId: userId2,
-        snappedAt: snappedAt2,
         snapshot: new KnowledgeElementCollection([knowledgeElement2]).toSnapshot(),
         campaignParticipationId: campaignParticipationId2,
       });
@@ -336,8 +304,6 @@ describe('Integration | Repository | KnowledgeElementSnapshotRepository', functi
         skillId: campaignLearningContent.skills[2].id,
       });
       databaseBuilder.factory.buildKnowledgeElementSnapshot({
-        userId: userId2,
-        snappedAt: snappedAt3,
         snapshot: new KnowledgeElementCollection([knowledgeElement3]).toSnapshot(),
         campaignParticipationId: campaignParticipationId3,
       });
diff --git a/api/tests/prescription/campaign/unit/application/api/knowledge-element-snapshots-api_test.js b/api/tests/prescription/campaign/unit/application/api/knowledge-element-snapshots-api_test.js
index 595c8a3e271..1e1b4fb0b88 100644
--- a/api/tests/prescription/campaign/unit/application/api/knowledge-element-snapshots-api_test.js
+++ b/api/tests/prescription/campaign/unit/application/api/knowledge-element-snapshots-api_test.js
@@ -27,8 +27,6 @@ describe('Unit | API | KnowledgeElementSnapshots', function () {
       saveSnapshotStub.rejects('I was not called with the expected args.');
       saveSnapshotStub
         .withArgs({
-          userId: snapshotPayload.userId,
-          snappedAt: new Date(),
           knowledgeElementCollection: new KnowledgeElementCollection(snapshotPayload.knowledgeElements),
           campaignParticipationId: snapshotPayload.campaignParticipationId,
         })
diff --git a/api/tests/prescription/scripts/add-missing-knowledge-element-snapshots_test.js b/api/tests/prescription/scripts/add-missing-knowledge-element-snapshots_test.js
index 160f2844af2..87590c10ffd 100644
--- a/api/tests/prescription/scripts/add-missing-knowledge-element-snapshots_test.js
+++ b/api/tests/prescription/scripts/add-missing-knowledge-element-snapshots_test.js
@@ -48,8 +48,6 @@ describe('Integration | Prescription | Scripts | add-missing-knowledge-element-s
         sharedAt: sharedAt2,
       });
       databaseBuilder.factory.buildKnowledgeElementSnapshot({
-        userId: user.id,
-        snappedAt: sharedAt2,
         campaignParticipationId: participationWithsnapshot.id,
       });
       await databaseBuilder.commit();
diff --git a/api/tests/shared/integration/domain/services/placement-profile-service_test.js b/api/tests/shared/integration/domain/services/placement-profile-service_test.js
index 9cd0d92fc12..b1108b39b25 100644
--- a/api/tests/shared/integration/domain/services/placement-profile-service_test.js
+++ b/api/tests/shared/integration/domain/services/placement-profile-service_test.js
@@ -513,7 +513,6 @@ describe('Shared | Integration | Domain | Services | Placement Profile Service',
     describe('PixScore by competences', function () {
       it('should assign pixScore and level to user competence based on knowledge elements', async function () {
         // given
-        const sharedAt = new Date('2022-01-05');
         const ke = databaseBuilder.factory.buildKnowledgeElement({
           competenceId: 'competenceRecordIdTwo',
           skillId: 'recRemplir2',
@@ -524,8 +523,6 @@ describe('Shared | Integration | Domain | Services | Placement Profile Service',
         });
 
         databaseBuilder.factory.buildKnowledgeElementSnapshot({
-          userId: userId,
-          snappedAt: sharedAt,
           campaignParticipationId: campaignParticipation.id,
           snapshot: new KnowledgeElementCollection([ke]).toSnapshot(),
         });
@@ -553,7 +550,6 @@ describe('Shared | Integration | Domain | Services | Placement Profile Service',
 
       it('should include both inferred and direct KnowlegdeElements to compute PixScore', async function () {
         // given
-        const sharedAt = new Date('2022-01-05');
         const ke1 = databaseBuilder.factory.buildKnowledgeElement({
           competenceId: 'competenceRecordIdTwo',
           skillId: 'recRemplir2',
@@ -575,8 +571,6 @@ describe('Shared | Integration | Domain | Services | Placement Profile Service',
         });
 
         databaseBuilder.factory.buildKnowledgeElementSnapshot({
-          userId: userId,
-          snappedAt: sharedAt,
           campaignParticipationId: campaignParticipation.id,
           snapshot: new KnowledgeElementCollection([ke1, ke2]).toSnapshot(),
         });
@@ -604,8 +598,6 @@ describe('Shared | Integration | Domain | Services | Placement Profile Service',
 
           databaseBuilder.factory.buildKnowledgeElementSnapshot({
             campaignParticipationId: campaignParticipation.id,
-            userId: userId,
-            snappedAt: campaignParticipation.sharedAt,
             snapshot: new KnowledgeElementCollection([ke]).toSnapshot(),
           });
 
@@ -639,8 +631,6 @@ describe('Shared | Integration | Domain | Services | Placement Profile Service',
 
           databaseBuilder.factory.buildKnowledgeElementSnapshot({
             campaignParticipationId: campaignParticipation.id,
-            userId: userId,
-            snappedAt: campaignParticipation.sharedAt,
             snapshot: new KnowledgeElementCollection([ke]).toSnapshot(),
           });
 
diff --git a/api/tests/shared/integration/infrastructure/repositories/knowledge-element-repository_test.js b/api/tests/shared/integration/infrastructure/repositories/knowledge-element-repository_test.js
index f590bf98606..d3ed20725b9 100644
--- a/api/tests/shared/integration/infrastructure/repositories/knowledge-element-repository_test.js
+++ b/api/tests/shared/integration/infrastructure/repositories/knowledge-element-repository_test.js
@@ -196,8 +196,6 @@ describe('Integration | Repository | knowledgeElementRepository', function () {
             });
             const knowledgeElementsBefore = new KnowledgeElementCollection([knowledgeElement1, knowledgeElement2]);
             databaseBuilder.factory.buildKnowledgeElementSnapshot({
-              userId,
-              snappedAt: new Date('2019-01-01'),
               campaignParticipationId,
               snapshot: knowledgeElementsBefore.toSnapshot(),
             });
diff --git a/high-level-tests/e2e/cypress/fixtures/knowledge-element-snapshots.json b/high-level-tests/e2e/cypress/fixtures/knowledge-element-snapshots.json
index afb19ca6fca..bc91af7027e 100644
--- a/high-level-tests/e2e/cypress/fixtures/knowledge-element-snapshots.json
+++ b/high-level-tests/e2e/cypress/fixtures/knowledge-element-snapshots.json
@@ -1,8 +1,6 @@
 [
   {
     "id": 1,
-    "userId": 4,
-    "snappedAt": "2019-04-22T06:00:00Z",
     "campaignParticipationId": 1,
     "snapshot": "[{\"id\":1,\"userId\":4,\"assessmentId\":1,\"source\":\"direct\",\"answerId\":1,\"status\":\"validated\",\"skillId\":\"recdFsWU9ij5bXZhD\",\"competenceId\":\"recoVElv3xmVppK5a\",\"createdAt\":\"2019-04-21T06:00:00Z\",\"earnedPix\":0.65},{\"id\":2,\"userId\":4,\"assessmentId\":1,\"source\":\"direct\",\"answerId\":2,\"status\":\"invalidated\",\"skillId\":\"recJieHaORILprKhL\",\"competenceId\":\"recxlJqKdbWHHFZMQ\",\"createdAt\":\"2019-04-21T06:00:00Z\",\"earnedPix\":0}]"
   }