How To Fix W4109 - &: & MPN material master record exists

W4109 - Overview

• Message type: E = Error

• Message class: W4 - Messages for material discontinuation

• Message number: 109

• Message text: &: & MPN material master record exists

What causes this issue?

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

System Response

How to fix this error?

Delete the <DS:GLOS.3526C061AFAB52B9E10000009B38F974>MPN</> material
master record. You can then archive the material.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

W4109 - Details

• Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  W4109 & : & MPN material master record exists
  
  Meaning / 
  Cause:
  
  This warning message indicates that a Material Master Record already exists for the given MPN (Manufacturer Part Number).
  The system is trying to create or assign a material master record with an MPN that is already linked to another material.
  This typically happens during material creation or when assigning/changing the MPN field in the material master.
  The MPN is expected to be unique or at least not duplicated in certain business contexts or configurations.
  
  
  When does it occur?
  
  When you try to create a new material with an MPN that is already assigned to another material.
  When you try to update/change the MPN field in an existing material master to a value that already exists for another material.
  In some SAP systems, the MPN field is used as a unique identifier for materials from a manufacturer,