How To Fix CM_SUB_DATA030 - Specification already inherits data; no reference assignment is possible

CM_SUB_DATA030 - Overview

• Message type: E = Error

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

• Message number: 030

• Message text: Specification already inherits data; no reference assignment is possible

What causes this issue?

The specification already occurs as a target specification in an
inheritance relationship. You cannot therefore assign reference
specifications to this specification.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CM_SUB_DATA030 - Specification already inherits data; no reference assignment is possible ?

  The SAP error message CM_SUB_DATA030 indicates that a specification already inherits data, and therefore, a reference assignment is not possible. This typically occurs in the context of SAP's Classification Management or Material Management modules, where specifications are used to define characteristics and values for materials or products.
  
  Cause:
  
  Inheritance of Data: The specification you are trying to assign a reference to already has inherited data from another specification. In SAP, when a specification inherits data, it means that it is already linked to another specification, and thus, it cannot accept another reference assignment.
  Incorrect Configuration: There may be a configuration issue where the specifications are not set up correctly, leading to conflicts in data inheritance.
  Data Integrity Rules: SAP has built-in data integrity rules that prevent multiple references to be assigned to a specification that already has inherited data.
  
  
  Solution:
  
  Check Inheritance: Review the specifications involved to see if the one you are trying to assign