How To Fix WS243 - Several identical items &2 exist for one document header &1

WS243 - Overview

• Message type: E = Error

• Message class: WS - Supplier Billing Document

• Message number: 243

• Message text: Several identical items &2 exist for one document header &1

What causes this issue?

The system checked whether the item data is unique. It found several
items with the same ID &V2& for document header &V1&.

System Response

You cannot execute the function.

How to fix this error?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

WS243 - Details

• Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  WS243 - Several identical items &2 exist for one document header &1
  
  
  Cause:
  This error occurs when you try to post or process a document in SAP, and the system detects that there are multiple line items within the same document that are identical in key fields that should be unique or distinct. Typically, this happens in financial accounting (FI) or materials management (MM) documents where line items are expected to be unique based on certain criteria (e.g., account number, cost center, amount, tax code, etc.).
  The system uses these key fields to identify and differentiate line items. If two or more line items are exactly the same in these key fields, SAP raises this error to prevent ambiguity or incorrect processing.
  
  Common Scenarios:
  
  Duplicate line items entered manually or via interface.
  Incorrect data mapping in interfaces or batch jobs.
  Posting documents with identical line items