How To Fix M8255 - Document & has been posted

M8255 - Overview

• Message type: E = Error

• Message class: M8 - Invoice Verification/Valuation

• Message number: 255

• Message text: Document & has been posted

What causes this issue?

You have entered the number of a document which has already been posted.
You cannot access this document for a second time.

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?

Please check what you have entered and make any necessary changes. If
you want to look at the document, exit Park and choose the function
<LS>Further processing -> Display</>.

Error message extract from SAP system. Copyright SAP SE.

M8255 - Details

• The SAP error message M8255 typically indicates that a document has already been posted in the system, and therefore, the action you are trying to perform (such as posting a new document or making changes) cannot be completed. This error is common in various SAP modules, particularly in Materials Management (MM) and Financial Accounting (FI).
  
  Cause:
  
  Duplicate Posting: The document you are trying to post or modify has already been posted in the system.
  Document Status: The document may be in a status that does not allow further changes or postings.
  Transaction Lock: The document might be locked by another user or process, preventing any modifications.
  Incorrect Document Number: You may be trying to post a document with an incorrect or non-existent document number.
  
  
  Solution:
  
  Check Document Status: Verify the status of the document in question. You can do this by using transaction codes like MB03 (Display Material Document) or FB03 (Display Document) to see if the