How To Fix USMD1042 - Data model &1, entity type &2: Number of leading entity types is invalid

USMD1042 - Overview

• Message type: E = Error

• Message class: USMD1 - Datenmodel

• Message number: 042

• Message text: Data model &1, entity type &2: Number of leading entity types is invalid

What causes this issue?

For entity types with storage and use type <LS>3</> for which the check
table is predefined by the data element or domain, the other key fields
in the check table must be mapped using relationships with <LS>Leading
</> as the relationship type. The check table for entity type &V2&
contains &V3& additional key fields. However, &V4& leading entity types
are defined using relationships.

System Response

The data model cannot be saved or activated.

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.

USMD1042 - Details

• The SAP error message USMD1042 typically occurs in the context of SAP Master Data Governance (MDG) when there is an issue with the configuration of the data model, specifically related to the entity types and their relationships.
  
  Cause:
  The error message indicates that there is an invalid number of leading entity types defined for a specific data model and entity type. This can happen due to several reasons:
  
  Configuration Error: The data model may not be configured correctly, leading to an inconsistency in the number of leading entity types.
  Missing or Incorrect Relationships: The relationships between entity types may not be properly defined, or there may be missing leading entity types that are required for the specific entity type in question.
  Data Model Changes: If there have been recent changes to the data model, such as adding or removing entity types, it may lead to this error if the changes were not properly reflected in