How To Fix EG121 - You cannot change the group mat. no; it is still a ref. group mat. no

EG121 - Overview

• Message type: E = Error

• Message class: EG - IS-U device management

• Message number: 121

• Message text: You cannot change the group mat. no; it is still a ref. group mat. no

What causes this issue?

The current device category is still a main serialization material
within a group of device categories. Therefore, you cannot change the
current group material.

System Response

Processing cannot be continued.

How to fix this error?

Enter the number of the current device category as the group material
number.
If you want to break up or change the serialization group of the
current device category, remove the reference to the current device
category from all dependent device categories of the serialization
group.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message EG121 - You cannot change the group mat. no; it is still a ref. group mat. no ?

  The SAP error message EG121 indicates that you are trying to change a group material number that is still being referenced as a reference group material number. This typically occurs in the context of material master data management, particularly when dealing with material groups and their relationships.
  
  Cause:
  The error arises when you attempt to modify a group material number that is currently linked to a reference group material number. In SAP, a reference group material number is used to maintain consistency and integrity in material data. If the group material number is still being referenced, the system prevents changes to avoid data inconsistencies.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check References: Identify where the group material number is being referenced. You can do this by checking the material master records or any related documents that might be using this group material number.
  
  
  Remove References: If possible, remove or change the references