How To Fix CL561 - A material group is already assigned to hierarchy material group &

CL561 - Overview

• Message type: E = Error

• Message class: CL - Classification

• Message number: 561

• Message text: A material group is already assigned to hierarchy material group &

What causes this issue?

Hierarchy material group &V1& is already allocated to a material group.
You cannot maintain another allocation.

System Response

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

How to fix this error?

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CL561 - A material group is already assigned to hierarchy material group & ?

  The SAP error message CL561 indicates that a material group is already assigned to a hierarchy material group. This typically occurs when you are trying to assign a material group to a hierarchy that already contains that material group, which is not allowed in SAP.
  
  Cause:
  
  Duplicate Assignment: The material group you are trying to assign is already part of the hierarchy.
  Hierarchy Structure: The hierarchy structure may not allow for the same material group to be assigned multiple times.
  Data Integrity: SAP enforces data integrity rules to prevent duplicate entries that could lead to inconsistencies in reporting and analysis.
  
  
  Solution:
  
  
  Check Existing Assignments: 
  
  Go to the hierarchy structure in SAP and check if the material group is already assigned. You can do this by navigating to the relevant transaction (e.g., CL20N for class hierarchy).
  
  
  
  Remove Duplicate Assignment:
  
  If the material group is already assigned and you need to make changes, you may need to remove it from