How To Fix WS191 - Document &1 already posted via customer settlement list &2

SAP Error Message - Details

• Message type: E = Error

• Message class: WS - Supplier Billing Document

• Message number: 191

• Message text: Document &1 already posted via customer settlement list &2

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 WS191 - Document &1 already posted via customer settlement list &2 ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WS191 Document &1 already posted via customer settlement list &2
  
  
  Cause:
  This error occurs when you try to post a document (usually a customer invoice or credit memo) that has already been posted through a customer settlement list. In SAP, a customer settlement list is used to settle multiple customer invoices or credit memos at once. If you attempt to post the same document again individually or through another settlement, the system prevents duplication by issuing this error.
  In other words, the document number &1 has already been processed and posted as part of the customer settlement list &2. Attempting to post it again leads to this error.
  
  Explanation:
  
  Document &1: The document number you are trying to post.
  Customer settlement list &2: The settlement list through which the document has already been posted.
  
  This is a safeguard to avoid double posting of the same document,