How To Fix EM101 - Legacy system key &1 has already been migrated

SAP Error Message - Details

• Message type: E = Error

• Message class: EM - IS-U Migration

• Message number: 101

• Message text: Legacy system key &1 has already been migrated

What causes this issue?

The data object with legacy system key &V1& has already been migrated
and cannot be migrated again.

System Response

INCLUDE ISU_VERARB OBJECT DOKU ID TX

How to fix this error?

Check key and status management.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message EM101 - Legacy system key &1 has already been migrated ?

  The SAP error message EM101 indicates that a legacy system key has already been migrated. This typically occurs during the process of migrating data from a legacy system into SAP, where the system is trying to import or process data that has already been migrated previously.
  Cause:
  
  Duplicate Migration Attempt: The most common cause of this error is that the system is attempting to migrate data for a legacy system key that has already been processed. This can happen if the migration process is run multiple times without proper checks.
  Incorrect Data: There may be an issue with the data being imported, such as incorrect legacy system keys or data that does not match the expected format.
  Configuration Issues: There might be configuration settings in the migration tool that are not set correctly, leading to the system not recognizing that the key has already been migrated.
  
  Solution:
  
  Check Migration Logs: Review the migration logs to identify if the legacy system key has indeed been migrated. This will help confirm whether the error is due to a duplicate attempt.
  Data Validation: Ensure that the data being migrated is correct and does not contain any duplicate entries for the legacy system key. Validate the data against the source system.
  Adjust Migration Process: If the migration process is being run multiple times, consider implementing checks to prevent reprocessing of already migrated keys. This could involve modifying the migration script or process to skip already migrated entries.
  Consult Documentation: Refer to SAP documentation or notes related to the specific migration tool you are using. There may be specific guidelines or patches available that address this issue.
  Contact SAP Support: If the issue persists and you cannot determine the cause, consider reaching out to SAP support for assistance. They may provide insights or solutions based on the specific version of SAP you are using.
  
  Related Information:
  
  Migration Tools: Familiarize yourself with the specific migration tools and methodologies used in your SAP environment, such as SAP Data Services, SAP S/4HANA Migration Cockpit, or others.
  Legacy System Migration Workbench: If you are using the Legacy System Migration Workbench (LSMW), ensure that the project settings are correctly configured to handle existing data.
  SAP Notes: Search for relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  By following these steps, you should be able to resolve the EM101 error and successfully complete your migration process.