How To Fix USMD1059 - Data model &1: Entity type &2 has leading relationship to entity type &3

SAP Error Message - Details

• Message type: E = Error

• Message class: USMD1 - Datenmodel

• Message number: 059

• Message text: Data model &1: Entity type &2 has leading relationship to entity type &3

What causes this issue?

In <LS>Leading</> relationships, the storage and use type of the
from-entity type must be <LS>1</> if the storage and use type of the
to-entity type is <LS>4</>.

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message USMD1059 - Data model &1: Entity type &2 has leading relationship to entity type &3 ?

  The SAP error message USMD1059 indicates that there is a problem with the data model configuration in the SAP Master Data Governance (MDG) system. Specifically, it points out that an entity type (let's call it Entity Type 2) has a leading relationship to another entity type (Entity Type 3), which can cause issues in the data model.
  Cause:
  The error typically arises due to the following reasons:
  
  Incorrect Relationship Definition: The relationship between the entity types is not defined correctly. In a leading relationship, the leading entity (Entity Type 2) should not have a direct relationship to the dependent entity (Entity Type 3) in a way that violates the expected hierarchy or relationship rules.
  Data Model Configuration Issues: There may be inconsistencies or misconfigurations in the data model setup, such as incorrect cardinality or relationship types.
  Modeling Errors: Errors in the modeling of the data entities, such as defining a relationship that does not conform to the business logic or data governance rules.
  
  Solution:
  To resolve the USMD1059 error, you can follow these steps:
  
  
  Review the Data Model: Check the data model configuration in the SAP MDG system. Look for the relationships defined between the entity types involved in the error message.
  
  
  Correct the Relationships:
  
  Ensure that the leading relationship is correctly defined. The leading entity should not have a direct relationship to the dependent entity unless it is intended and correctly modeled.
  Adjust the cardinality and relationship types as necessary to align with the business requirements and data governance rules.
  
  
  
  Validate the Data Model: After making changes, validate the data model to ensure that there are no further issues. Use the MDG data model tools to check for consistency and correctness.
  
  
  Test the Changes: Once the adjustments are made, test the data model to ensure that the error no longer occurs and that the relationships function as expected.
  
  
  Consult Documentation: Refer to SAP documentation or guides related to data modeling in MDG for best practices and examples of correct relationship definitions.
  
  
  Seek Help from SAP Support: If the issue persists after making the necessary adjustments, consider reaching out to SAP support for further assistance.
  
  
  Related Information:
  
  SAP MDG Documentation: Review the official SAP documentation for Master Data Governance, which provides insights into data modeling, entity relationships, and best practices.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  Training Resources: Consider training or workshops on SAP MDG to better understand data modeling and governance principles.
  
  By following these steps, you should be able to identify and resolve the underlying issues causing the USMD1059 error in your SAP MDG system.