How To Fix /SPE/PO_CHANGE009 - Main item is locked; sub items cannot be created for main item

/SPE/PO_CHANGE009 - Overview

• Message type: E = Error

• Message class: /SPE/PO_CHANGE -

• Message number: 009

• Message text: Main item is locked; sub items cannot be created for main item

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.

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/SPE/PO_CHANGE009 - Details

• The SAP error message /SPE/PO_CHANGE009 indicates that a main item in a purchase order (PO) is locked, which prevents the creation of sub-items for that main item. This can occur in various scenarios, such as when the main item is being edited by another user, or if there are certain restrictions or settings in place that lock the item.
  Causes:
  
  Concurrent Access: Another user is currently editing the main item, causing it to be locked.
  System Lock: The system may have placed a lock on the item due to a previous transaction that has not been completed.
  Status of the Main Item: The main item may be in a status that does not allow for sub-items to be created (e.g., if it is already processed or completed).
  Custom Logic: There may be custom logic or enhancements in place that enforce locking under certain conditions.
  
  Solutions:
  
  Check for Concurrent Users: Verify if another user is currently editing the