How To Fix MEPO021 - Item number cannot now be changed

MEPO021 - Overview

• Message type: E = Error

• Message class: MEPO - New Purchase Order Dialog

• Message number: 021

• Message text: Item number cannot now be changed

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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MEPO021 - Details

• The SAP error message MEPO021 ("Item number cannot now be changed") typically occurs in the context of purchasing documents, such as purchase orders or contracts, when there is an attempt to change the item number of a line item that is no longer editable. This can happen for several reasons, including:
  Causes:
  
  Document Status: The document may be in a status that does not allow changes (e.g., it has been released, or it is already in the process of being processed).
  Item History: The item may have been referenced in subsequent documents (like goods receipts or invoices), making it non-editable.
  Document Type Restrictions: Certain document types may have restrictions on changing item numbers after a certain point in the workflow.
  User Authorizations: The user may not have the necessary authorizations to make changes to the document.
  
  Solutions:
  
  Check Document Status: Verify the status of the document. If it is in a completed or locked state, you may