How To Fix EM139 - Migration object &1 already exists with external system key &2

SAP Error Message - Details

• Message type: E = Error

• Message class: EM - IS-U Migration

• Message number: 139

• Message text: Migration object &1 already exists with external system key &2

What causes this issue?

External system key &v2& for migration object &v1& already exists in
key and status management.

System Response

INCLUDE ISU_VERARB OBJECT DOKU ID TX

How to fix this error?

Check the existing entries before you change an external system key.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message EM139 - Migration object &1 already exists with external system key &2 ?

  The SAP error message EM139, which states "Migration object &1 already exists with external system key &2," typically occurs during data migration processes when there is an attempt to create or import a migration object that already exists in the system with the specified external system key.
  Cause:
  
  
  Duplicate Entry: The error indicates that there is already an entry in the target system for the migration object identified by the external system key. This could happen if:
  
  The migration process is being run multiple times without proper cleanup.
  The data being imported contains duplicates.
  The migration object was previously created and not deleted or updated.
  
  
  
  Incorrect Data: The data being imported may have been incorrectly prepared, leading to conflicts with existing records.
  
  
  Solution:
  
  
  Check Existing Records: 
  
  Verify if the migration object with the specified external system key already exists in the target system. You can do this by querying the relevant tables or using transaction codes that allow you to view migration objects.
  
  
  
  Remove or Update Existing Entry:
  
  If the existing entry is no longer needed, you can delete it from the system.
  If the entry needs to be updated, ensure that the data being imported is correct and reflects the necessary changes.
  
  
  
  Adjust Migration Data:
  
  Review the data being migrated to ensure there are no duplicates. If duplicates are found, remove or modify them before re-running the migration.
  
  
  
  Use a Different External System Key:
  
  If applicable, consider using a different external system key for the new migration object to avoid conflicts.
  
  
  
  Consult Documentation: 
  
  Refer to SAP documentation or notes related to the specific migration process you are using, as there may be additional guidelines or best practices.
  
  
  
  Related Information:
  
  Transaction Codes: Depending on the migration scenario, you may use transaction codes like LTMC (for Migration Cockpit) or LTMOM (for Migration Object Modeler) to manage migration objects.
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  Data Migration Best Practices: Familiarize yourself with best practices for data migration in SAP to minimize the chances of encountering such errors in the future.
  
  By following these steps, you should be able to resolve the EM139 error and successfully complete your data migration process.