How To Fix CM_SUB_DATA021 - Value assignment type &1 allows only one instance; no authoriz. for this

CM_SUB_DATA021 - Overview

• Message type: E = Error

• Message class: CM_SUB_DATA - Substance Data (Header, ID, Reference, Materials)

• Message number: 021

• Message text: Value assignment type &1 allows only one instance; no authoriz. for this

What causes this issue?

In Customizing, it is defined that the value assignment type &v1& can
only have one instance. An instance exists, but you do not have
authorization for it.

System Response

The value assignment type cannot be displayed.

How to fix this error?

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

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CM_SUB_DATA021 - Value assignment type &1 allows only one instance; no authoriz. for this ?

  The SAP error message CM_SUB_DATA021 indicates that there is an issue with the value assignment type in the context of a specific object or transaction. This error typically arises when a value assignment type is configured to allow only one instance, but the system is trying to create or modify multiple instances, or the user does not have the necessary authorization to perform the action.
  
  Cause:
  
  Single Instance Restriction: The value assignment type specified (denoted as &1 in the error message) is configured to allow only one instance. This means that for the particular object or transaction, you cannot have multiple entries or instances of that value assignment type.
  Authorization Issues: The user attempting to perform the action may not have the necessary authorizations to create or modify the instance of the value assignment type.
  
  
  Solution:
  
  
  Check Configuration:
  
  Review the configuration of the value assignment type in the relevant customizing settings (usually found in the SAP