Message type: E = Error
Message class:  FTR_TRES -  
Message number: 015
Message text: You are already editing transaction &2 in company code &1
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.
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The SAP error message FTR_TRES015 indicates that a user is trying to edit a transaction that is already being edited by another user in the specified company code. This is a common issue in SAP systems when multiple users attempt to access the same transaction simultaneously.
Cause: Concurrent Editing: Another user is currently editing the same transaction in the specified company code. Session Lock: The transaction may be locked due to a previous session that was not properly closed or terminated. User Lock: The system may have a lock mechanism that prevents multiple users from editing the same transaction to maintain data integrity.
Solution: Check Active Sessions: Verify if another user is indeed editing the transaction. You can do this by checking the transaction logs or using transaction codes like SM12 (to check for locks) or SM20 (to check for user activity). Wait and Retry: If another user is editing the transaction, you may need to wait
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