How To Fix USMD1056 - Data model &1, ent. type &2: Entity type for hierarchy name is ambiguous

SAP Error Message - Details

• Message type: E = Error

• Message class: USMD1 - Datenmodel

• Message number: 056

• Message text: Data model &1, ent. type &2: Entity type for hierarchy name is ambiguous

What causes this issue?

For entity types for which you can set up a hierarchy, you must select
one additional entity type that represents the hierarchy name

System Response

The data model cannot be saved or activated.

How to fix this error?

Choose an additional entity type for the hierarchy name.

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 USMD1056 - Data model &1, ent. type &2: Entity type for hierarchy name is ambiguous ?

  The SAP error message USMD1056 indicates that there is an ambiguity in the entity type for a hierarchy name in the data model. This typically occurs in the context of SAP Master Data Governance (MDG) when working with hierarchies in data models.
  Cause:
  The error arises when the system encounters multiple entity types that could correspond to the same hierarchy name. This can happen due to:
  
  Duplicate Hierarchy Names: There are multiple entity types defined with the same hierarchy name, leading to confusion about which one to use.
  Incorrect Configuration: The data model may not be configured correctly, causing the system to misinterpret the hierarchy definitions.
  Changes in Data Model: If there have been recent changes to the data model or entity types, it may lead to inconsistencies.
  
  Solution:
  To resolve the USMD1056 error, you can take the following steps:
  
  
  Check Hierarchy Definitions:
  
  Go to the data model configuration in SAP MDG.
  Verify the hierarchy names and ensure that they are unique across different entity types.
  
  
  
  Review Entity Types:
  
  Identify the entity types associated with the hierarchy name in question.
  Ensure that there are no duplicate entries or conflicting definitions.
  
  
  
  Adjust Data Model Configuration:
  
  If you find duplicates, consider renaming the hierarchy or consolidating the entity types to eliminate ambiguity.
  Make sure that the hierarchy is correctly assigned to the appropriate entity type.
  
  
  
  Test Changes:
  
  After making adjustments, test the data model to ensure that the error no longer occurs.
  Validate that the hierarchy functions as expected in the context of your data governance processes.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific guidelines on configuring hierarchies and entity types in MDG.
  
  
  
  Seek Support:
  
  If the issue persists, consider reaching out to SAP support or consulting with an SAP expert who can provide more tailored assistance based on your specific configuration.
  
  
  
  Related Information:
  
  SAP MDG Documentation: Review the official SAP documentation for Master Data Governance to understand best practices for managing hierarchies and entity types.
  Transaction Codes: Familiarize yourself with relevant transaction codes (like MDGIMG) that can help you navigate the configuration settings.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to resolve the ambiguity causing the USMD1056 error and ensure your data model is correctly configured.