How To Fix WW018 - Material group & already exists as MG hierarchy level

WW018 - Overview

• Message type: E = Error

• Message class: WW - Material group master maintenance

• Message number: 018

• Message text: Material group & already exists as MG hierarchy level

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?

Enter a key term that is not already being used to describe a material
group, a characteristics profile or a generic material.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message WW018 - Material group & already exists as MG hierarchy level ?

  The SAP error message WW018 indicates that there is an issue with the material group (MG) hierarchy in the system. Specifically, it means that the material group you are trying to create or modify already exists at a higher level in the material group hierarchy. This can occur when you attempt to create a new material group that has the same name or identifier as an existing one, or when you try to assign a material group to a hierarchy level that is already occupied.
  
  Cause:
  
  Duplicate Material Group: You are trying to create a material group that already exists in the system.
  Hierarchy Conflict: The material group you are trying to assign is already part of a different hierarchy level.
  Incorrect Configuration: There may be a misconfiguration in the material group hierarchy settings.
  
  
  Solution:
  
  
  Check Existing Material Groups: 
  
  Use transaction code OMD1 or OMD2 to view the existing material groups and their hierarchy. Ensure that