diff --git a/src/shell/store/contentVersions.js b/src/shell/store/contentVersions.js
index badd6c553..dab3f1bfe 100644
--- a/src/shell/store/contentVersions.js
+++ b/src/shell/store/contentVersions.js
@@ -1,7 +1,9 @@
 import { request } from "utility/request";
 
 export function contentVersions(state = {}, action) {
-  const existingVersions = state[action.itemZUID] || [];
+  const existingVersions = Array.isArray(state[action.itemZUID])
+    ? state[action.itemZUID]
+    : [];
 
   switch (action.type) {
     case "FETCH_ITEM_SUCCESS":