How To Fix WSUBST029 - Substitution data already exists for item &1, purchase order &2

WSUBST029 - Overview

• Message type: E = Error

• Message class: WSUBST - Substitution Article Handling

• Message number: 029

• Message text: Substitution data already exists for item &1, purchase order &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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message WSUBST029 - Substitution data already exists for item &1, purchase order &2 ?

  Certainly! Here's a detailed explanation for the SAP error message WSUBST029: "Substitution data already exists for item &1, purchase order &2":
  
  Error Message
  WSUBST029
  Text: Substitution data already exists for item &1, purchase order &2
  
  &1 = Item number  
  &2 = Purchase order number
  
  
  Cause
  This error occurs when you try to create or insert substitution data for a purchase order item that already has substitution data maintained in the system. In SAP, substitution rules allow automatic replacement or modification of data fields during document processing (e.g., purchase orders). The system prevents duplicate substitution entries for the same item to avoid conflicts or inconsistencies.
  In other words, the system detects that substitution data for the specified purchase order item already exists, and you are attempting to create a new substitution record for the same item, which is not allowed.
  
  When does it occur?
  
  When maintaining substitution rules manually via transaction codes like ME22N (Change Purchase Order) or through