How To Fix USMD1109 - Data model &1, entity type &2: Relationship &3 was removed

SAP Error Message - Details

• Message type: E = Error

• Message class: USMD1 - Datenmodel

• Message number: 109

• Message text: Data model &1, entity type &2: Relationship &3 was removed

What causes this issue?

Removing relationships with the relationship type <LS>Leading</> or
<LS>Qualifying</> is not allowed, since it causes key fields to be
deleted in the generated database tables. You can remove other
relationships, however.

System Response

If you have tried to remove a relationship with <LS>Leading</> or
<LS>Qualifying</> as the relationship type, there is a loss of data when
the database tables are regenerated.
If you have tried to delete another relationship, the corresponding
non-key field is deleted from the generated database table. The data in
the non-key field is lost.

How to fix this error?

Check if there is already master data stored in the generated database
tables.
Check if the relationship you want to remove is a <LS>Leading</> or
<LS>Qualifying</> relationship.

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 USMD1109 - Data model &1, entity type &2: Relationship &3 was removed ?

  The SAP error message USMD1109 indicates that a specific relationship in a data model has been removed. This message typically arises in the context of SAP Master Data Governance (MDG) when working with data models and entities.
  Cause:
  The error message USMD1109 can occur due to several reasons:
  
  Data Model Changes: The relationship between entities may have been intentionally removed during a data model change or upgrade.
  Configuration Issues: There may be inconsistencies in the configuration of the data model or the relationships defined within it.
  Data Integrity Violations: If there are existing records that violate the integrity of the relationship, the system may remove the relationship to maintain data integrity.
  Transport Issues: If the data model was transported from one system to another, there may have been issues during the transport process that led to the removal of the relationship.
  
  Solution:
  To resolve the USMD1109 error, consider the following steps:
  
  
  Check Data Model Configuration:
  
  Review the data model configuration in the SAP MDG system to ensure that the relationship in question is correctly defined.
  If the relationship was removed intentionally, you may need to update your data processing logic to accommodate this change.
  
  
  
  Recreate the Relationship:
  
  If the relationship was removed unintentionally, you can recreate it in the data model configuration.
  Use the MDG Data Model Configuration tools to add the relationship back.
  
  
  
  Data Consistency Check:
  
  Perform a data consistency check to identify any records that may be causing integrity violations.
  Resolve any inconsistencies before attempting to re-establish the relationship.
  
  
  
  Review Transport Logs:
  
  If the issue arose after a transport, review the transport logs for any errors or warnings that may indicate what went wrong during the transport process.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to the specific version of MDG you are using for any known issues or additional guidance.
  
  
  
  Seek Support:
  
  If the issue persists, consider reaching out to SAP support or your internal SAP team for further assistance.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context.
  MDG Documentation: Review the official SAP MDG documentation for best practices on managing data models and relationships.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed.
  
  By following these steps, you should be able to diagnose and resolve the USMD1109 error effectively.