Symptoms

The task is failing with the following result in Processing Server:

  -1 1 5/22/2021 7:52:47 AM Task processing has started

  -1 2 5/22/2021 7:52:48 AM After serialization, the page ID '3' differs from the original '2'.

  -1 3 5/22/2021 7:52:48 AM Cannot find parent for edit session "SessionID" in method { call EditSession_CommitForTask(?, ?, ?) }

  -1 4 5/22/2021 7:52:48 AM Task processing completed
  

Resolution

1. Log in to Administration & Monitoring Console, then go to Sessions and clear/delete all sessions.
2. Open your DB and check if session "SessionID" exists in the dbo.Task. If so, clear the dbo.Task table of any entries corresponding to the session ID "SessionID" and any new session ID that encounters the same error message.
3. Delete the contents of the table dbo.SessionTask as some entries may be stuck there.
4. The last column in the table is "EditSessionID". Try to find any task related to the session and delete it as well.