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

SAP Error Message - Details

• 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.

Smart SAP Assistant

• What is the cause and solution for SAP error message WW091 - Material group & also exists as material with same name ?

  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 it does, consider renaming the material group to avoid the conflict.
  
  
  
  Rename the Material Group:
  
  If you are creating a new material group, choose a different name that does not conflict with existing materials.
  Ensure that the new name adheres to your organization’s naming conventions.
  
  
  
  Delete or Modify Existing Material:
  
  If the existing material is no longer needed, you may consider deleting it (if allowed) or modifying its name to free up the name for the material group.
  
  
  
  Consult with Your Team:
  
  If you are unsure about the implications of renaming or deleting materials, consult with your team or a supervisor to ensure that you are not disrupting any processes.
  
  
  
  Related Information:
  
  Material Groups: Material groups are used in SAP to categorize materials for reporting and analysis purposes. They help in managing inventory and procurement processes.
  Naming Conventions: It is essential to establish clear naming conventions for materials and material groups to avoid such conflicts in the future.
  SAP Documentation: Refer to SAP Help documentation for more details on material management and error handling.
  
  By following these steps, you should be able to resolve the WW091 error and proceed with your material group creation or modification.