How To Fix WS306 - Document & is a settlement document

WS306 - Overview

• Message type: E = Error

• Message class: WS - Supplier Billing Document

• Message number: 306

• Message text: Document & is a settlement document

What causes this issue?

Document &V1& which you entered exists but does not have the document
category you selected.

System Response

An update is simulated if you confirm this warning message.

How to fix this error?

Please check the document number.

Error message extract from SAP system. Copyright SAP SE.

WS306 - Details

• The SAP error message WS306: Document & is a settlement document typically occurs in the context of settlement processing in SAP Controlling (CO), especially when dealing with internal orders, projects, or other cost objects.
  
  Cause of the Error WS306
  
  The error indicates that the referenced document is a settlement document.
  Settlement documents are created when costs are settled from one cost object (like an internal order) to another (like a cost center, asset, or profitability segment).
  The system prevents certain postings or actions on documents that are already settlement documents because these documents represent finalized cost allocations.
  This error often occurs when you try to perform an operation (such as reversing, changing, or reposting) on a document that has already been settled or is linked to a settlement process.
  
  
  When Does This Error Occur?
  
  Attempting to reverse or change a settlement document.
  Trying to settle a document that is already a settlement document.
  Posting a document that conflicts with