diff --git a/lib/reducers/message-reducer.js b/lib/reducers/message-reducer.js
--- a/lib/reducers/message-reducer.js
+++ b/lib/reducers/message-reducer.js
@@ -1620,7 +1620,7 @@
     for (const threadID in actionPayloadMessageStoreThreads) {
       newThreads[threadID] = {
         ...actionPayloadMessageStoreThreads[threadID],
-        messageIDs: messageStore.threads[threadID].messageIDs,
+        messageIDs: messageStore.threads[threadID]?.messageIDs ?? [],
       };
     }
 
@@ -1630,7 +1630,7 @@
         threads: newThreads,
       },
       messageStore,
-      action.type,
+      `${action.type} | comparing SQLite with redux-persist`,
     );
 
     const { messageStoreOperations, messageStore: updatedMessageStore } =