How To Fix USMD1A016 - Change request &2 locked by user &1

USMD1A016 - Overview

• Message type: E = Error

• Message class: USMD1A - Messages: Abstraction Layer

• Message number: 016

• Message text: Change request &2 locked by user &1

What causes this issue?

A change request is locked when you change its processing status and it
is processed directly (for example, by adding new objects). A change
request is also locked when new objects or hierarchy relationships are
added. This occurs in single processing, data transfer (upload of master
data, language-dependent texts or hierarchies), or in collective
processing.
As a consequence, if a change request is used for multiple entity types,
these cannot be processed simultaneously because each locks the same
change request.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

You can use transaction SM12 to view the locks. The lock table is called
USMD120C and the lock arguments are the client and the technical key of
the change request.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

USMD1A016 - Details

• The SAP error message USMD1A016 indicates that a change request is locked by a specific user. This typically occurs in the context of SAP Master Data Governance (MDG) when a user attempts to access or modify a change request that is currently locked by another user.
  
  Cause:
  
  User Locking: The change request is being edited or processed by another user, which prevents other users from making changes to it simultaneously.
  Session Timeout: If a user has an active session that has not been properly closed, it may still hold a lock on the change request.
  Technical Issues: Sometimes, technical issues or system errors can lead to locks not being released properly.
  
  
  Solution:
  
  Identify the Locking User: Check who is currently holding the lock on the change request. This can usually be done through transaction codes like SM12 (to view locks) or SM21 (to check system logs).
  Wait for Release: If the locking user is actively working on