How To Fix WPS01121 - Parent task list key &1 / ext. ID &2: Enqueue error

WPS01121 - Overview

• Message type: E = Error

• Message class: WPS01 - Revision Planning - Task List Hierarchy

• Message number: 121

• Message text: Parent task list key &1 / ext. ID &2: Enqueue error

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message WPS01121 - Parent task list key &1 / ext. ID &2: Enqueue error ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WPS01121 Parent task list key &1 / ext. ID &2: Enqueue error
  
  Meaning / 
  Cause:
  
  This error occurs when the system tries to lock (enqueue) a parent task list but fails.
  The enqueue error indicates that the lock on the parent task list key (with the given external ID) could not be obtained because it is already locked by another user or process.
  This situation typically arises in maintenance task list processing or work scheduling scenarios where multiple users or background jobs attempt to access or modify the same task list simultaneously.
  The enqueue mechanism in SAP is designed to prevent data inconsistencies by serializing access to certain objects. If the lock is held by another session, the enqueue request will fail, resulting in this error.
  
  
  Common Causes:
  
  Another user or process currently holds the lock on the parent task list.
  Long-running transaction or job that locked