How To Fix MN020 - A settlement document has already been prepared for posting

MN020 - Overview

• Message type: E = Error

• Message class: MN - Message class for subsequent settlement (Purchasing)

• Message number: 020

• Message text: A settlement document has already been prepared for posting

What causes this issue?

You have already carried out a settlement run for the rebate
arrangement currently being processed. This resulted in the
preparation of a settlement document (one billing document or several
credit memo documents) being prepared for posting.
Repeating the settlement run would cause these documents to be deleted
and, if applicable, new settlement documents to be prepared for
posting.

System Response

The function "Settlement accounting" has been terminated because you
did not acknowledge the warning message.

How to fix this error?

Please check whether or not you wish to post the already-prepared
settlement document. To post the document, please save the rebate
arrangement.
If you do not wish to save the document, reinvoke the "Settlement
accounting" function and acknowledge the warning message.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MN020 - A settlement document has already been prepared for posting ?

  The SAP error message MN020, which states "A settlement document has already been prepared for posting," typically occurs in the context of the settlement process in SAP, particularly when dealing with internal orders, projects, or other cost objects. This error indicates that a settlement document has already been created for the specified cost object, and therefore, the system does not allow for another settlement to be processed for the same period.
  
  Cause:
  
  Duplicate Settlement Attempt: The most common cause of this error is an attempt to settle the same cost object more than once for the same period.
  Incomplete Previous Settlement: If a previous settlement was not completed or was interrupted, it may still be locked in the system.
  Incorrect Configuration: There may be configuration issues in the settlement settings that prevent further settlements.
  
  
  Solution:
  
  
  Check Existing Settlement Documents: 
  
  Use transaction codes like KO88 (for order settlement) or CJI3 (for project settlement) to check if a