How To Fix RSDD_LM009 - Source '&1', linked as a union with field '&2', does not exist

SAP Error Message - Details

• Message type: E = Error

• Message class: RSDD_LM - Messages for Lean Modeler (API and RSLIMO)

• Message number: 009

• Message text: Source '&1', linked as a union with field '&2', does not exist

What causes this issue?

Every link has a source (a field in the provider) and a target (a field
in the CompositeProvider).
Source &V1& of the link to CompositeProvider field &V2& does not exist
in provider &V3& (union).

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?

The provider might have been changed, and the field deleted or renamed.
Delete the link.

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 RSDD_LM009 - Source '&1', linked as a union with field '&2', does not exist ?

  The SAP error message RSDD_LM009 indicates that there is an issue with a data source in the context of a data model or a query. Specifically, it suggests that a source (likely a data source or InfoProvider) that is linked as a union with a specific field does not exist or cannot be found.
  
  Cause:
  
  Missing Data Source: The data source specified in the error message (&1) may have been deleted, renamed, or is not activated.
  Incorrect Field Reference: The field specified (&2) may not exist in the data source or may have been incorrectly referenced.
  Transport Issues: If the data source was transported from another system, it may not have been transported correctly or completely.
  Authorization Issues: The user may not have the necessary authorizations to access the specified data source.
  Modeling Errors: There may be errors in the data model or query definition that are causing the system to look for a non-existent source.
  
  
  Solution:
  
  Verify