How To Fix USMD1594 - Model &1, ent.type &2: Relationship &3 is not a foreign key relationship

SAP Error Message - Details

• Message type: E = Error

• Message class: USMD1 - Datenmodel

• Message number: 594

• Message text: Model &1, ent.type &2: Relationship &3 is not a foreign key relationship

What causes this issue?

Editing in the <LS>Fields of Foreign Key Relationships</> view is only
possible for relationships with the type <LS>foreign key relationship</>
.

System Response

The data model cannot be saved or activated.

How to fix this error?

Edit the fields in the <LS>Fields of Foreign Key Relationships</> view
in Customizing activity <DS:SIMG.FMDM_USMD001>Edit Data Model</>.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message USMD1594 - Model &1, ent.type &2: Relationship &3 is not a foreign key relationship ?

  The SAP error message USMD1594 indicates that there is an issue with a relationship defined in a model, specifically that the relationship in question is not recognized as a foreign key relationship. This error typically arises in the context of SAP Master Data Governance (MDG) when working with data models and relationships between entities.
  
  Cause:
  
  
  Incorrect Relationship Definition: The relationship defined between the entities does not adhere to the foreign key constraints expected by the system. This could be due to:
  
  The relationship not being properly defined in the data model.
  The source and target entities not having a valid foreign key relationship in the underlying database tables.
  The relationship type being incorrectly specified.
  
  
  
  Data Model 
  Configuration Issues: There may be issues in the configuration of the data model itself, such as missing or incorrect settings for the entities involved.
  
  
  Inconsistent Data: If the data in the database does not conform to the expected foreign key relationships,