How To Fix WP618 - Supplier & from original purchase order cannot be changed

SAP Error Message - Details

• Message type: E = Error

• Message class: WP - Messages from POS interface

• Message number: 618

• Message text: Supplier & from original purchase order cannot 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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message WP618 - Supplier & from original purchase order cannot be changed ?

  The SAP error message WP618: "Supplier & from original purchase order cannot be changed" typically occurs in the context of purchase order (PO) processing, especially when you try to change the supplier on a PO or a related document where the supplier is not allowed to be changed.
  
  Cause
  
  The error arises because the supplier/vendor assigned to the original purchase order cannot be changed once the PO has been created and certain subsequent processes have been performed.
  This restriction exists to maintain data consistency and integrity in procurement processes.
  For example, if you try to change the supplier on a PO that already has goods receipts, invoice receipts, or is referenced in other documents (like contracts, scheduling agreements, or purchase requisitions), SAP prevents this change.
  The system enforces that the supplier/vendor remains the same to avoid inconsistencies in delivery, invoicing, and payment processes.
  
  
  When does this error typically occur?
  
  When attempting to change the supplier/vendor on an