How To Fix ME540 - Message already sent to partner "&"

ME540 - Overview

• Message type: E = Error

• Message class: ME - Purchasing: General Messages

• Message number: 540

• Message text: Message already sent to partner "&"

What causes this issue?

You are attempting to change or delete a partner to whom a message has
already been sent.

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?

Check that the document really has already been sent. If necessary,
contact the existing partner.
Making this change may lead to misunderstandings, since the document
may then be sent to several partners (e.g. ordering addresses).
INCLUDE NA_T160M LANGUAGE EN

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message ME540 - Message already sent to partner "&" ?

  The SAP error message ME540 ("Message already sent to partner '&'") typically occurs in the context of the SAP system when there is an attempt to resend a message (such as a purchase order or other document) to a partner (like a vendor or customer) that has already received that message. This can happen in various scenarios, such as when using EDI (Electronic Data Interchange) or other forms of message communication.
  
  Cause:
  
  Duplicate Message Sending: The system has a built-in mechanism to prevent the same message from being sent multiple times to avoid confusion or duplication in processing.
  Message Status: The message may already be marked as sent in the system, and any subsequent attempts to send it again will trigger this error.
  
  Configuration Issues: There may be issues with the configuration of the message types or partner profiles that lead to this error.
  System Errors: Sometimes, system errors or inconsistencies in the database can