How To Fix WW091 - Material group & also exists as material with same name

WW091 - Overview

• Message type: E = Error

• Message class: WW - Material group master maintenance

• Message number: 091

• Message text: Material group & also exists as material with same name

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?

Give the material group a different name or delete the material number
in the next reorganization run.

Error message extract from SAP system. Copyright SAP SE.

WW091 - Details

• The SAP error message WW091 indicates that there is a conflict in the system where a material group is being created or modified, but there is already a material with the same name as the material group. This can lead to confusion in the system, as both entities cannot coexist with identical names.
  
  Cause:
  
  Duplicate Naming: The primary cause of this error is that the material group you are trying to create or modify has the same name as an existing material in the system.
  Data Entry Error: It may also occur due to a typographical error during data entry, where the user inadvertently tries to create a material group with a name that already exists as a material.
  
  
  Solution:
  To resolve the WW091 error, you can take the following steps:
  
  
  Check Existing Materials: 
  
  Use transaction codes like MM03 (Display Material) or MM02 (Change Material) to check if a material with the same name already exists.
  If