How To Fix >1406 - Document &1 cannot be reversed because the PSP has already been informed.

>1406 - Overview

• Message type: E = Error

• Message class: >1 - Shockwave SAPGUI message handling

• Message number: 406

• Message text: Document &1 cannot be reversed because the PSP has already been informed.

Self-Explanatory Message

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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.

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• What is the cause and solution for SAP error message >1406 - Document &1 cannot be reversed because the PSP has already been informed. ?

  The SAP error message "1406 Document &1 cannot be reversed because the PSP has already been informed" typically occurs in the context of Project System (PS) when you attempt to reverse a document (like a financial document or a project-related transaction) that has already been communicated to the Project System (PS) or has been processed in a way that prevents reversal.
  
  Cause:
  
  Document Status: The document you are trying to reverse has already been processed, and the Project System has been informed about it. This means that the document is likely in a status that does not allow for reversal.
  Integration with Other Modules: The document may have implications in other modules (like Controlling, Financial Accounting, etc.) that prevent it from being reversed.
  PS Notifications: The Project System may have already received notifications or updates regarding the document, making it impossible to reverse it without addressing those notifications first.
  
  
  Solution:
  
  Check Document Status: Review the status