docs(migration): add information about set variables async api changes

Author: joaquinfelici

content/update/minor/722-to-723/_index.md

@@ -0,0 +1,28 @@
+---
+
+title: "Update from 7.22 to 7.23"
+weight: 1
+layout: "single"
+
+menu:
+  main:
+    name: "7.22 to 7.23"
+    identifier: "migration-guide-723"
+    parent: "migration-guide-minor"
+    pre: "Update from `7.22.x` to `7.23.0`."
+
+---
+
+This document guides you through the update from Camunda `7.22.x` to `7.23.0` and covers the following use cases:
+
+1. For developers: [Set Variables Async API](#Set Variables Async API)
+
+This guide covers mandatory migration steps and optional considerations for the initial configuration of new functionality included in Camunda 7.23.
+
+# Set Variables Async API
+
+Before version 7.22.1, the Set Variables Async API failed whenever at least one of the process instances did not exist. 
+
+Starting with version 7.22.1, the behavior has changed: if any of the process instances was deleted or completed, the call will still succeed. As a consequence, the Set Variables Batch Operation will also succeed in this case.
+
+Please note that this does not apply to the Sync API, which keeps its behavior and fails if the process instance does not exist.

content/update/patch-level.md

@@ -530,6 +530,14 @@ With this patch release, we lifted this limitation by opting for a different sol
 
 [process-instance-modification]: {{< ref "/webapps/cockpit/bpmn/process-instance-modification.md#perform-a-batch-modification" >}}
 
+### Set Variables Async API
+
+Before version 7.22.1, the Set Variables Async API failed whenever at least one of the process instances did not exist.
+
+Starting with version 7.22.1, the behavior has changed: if any of the process instances was deleted or completed, the call will still succeed. As a consequence, the Set Variables Batch Operation will also succeed in this case.
+
+Please note that this does not apply to the Sync API, which keeps its behavior and fails if the process instance does not exist.
+
 # Full Distribution
 
 This section is applicable if you installed the [Full Distribution]({{< ref "/introduction/downloading-camunda.md#full-distribution" >}}) with a **shared process engine**. In this case you need to update the libraries and applications installed inside the application server.