How To Fix CNV_DMC_SIN446 - Migration key date for company code &1 has already status 'Completed'

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_DMC_SIN - Messages for s-innovations migration

• Message number: 446

• Message text: Migration key date for company code &1 has already status 'Completed'

What causes this issue?

Before you start with the initial data transfer, you must define an
overall migration key date for each company code.
This customizing step has been performed for the company code &V1& but
the status is already on 'Completed'. Migration of transactional data is
not possible with this status.

System Response

How to fix this error?

Use app "Define Settings for Legacy Data Transfer" to maintain the
required initial migration key date for relevant company codes.
Set the "Legacy Data Transfer Status" to:
In Preparation
Migration key date is still in clarification
Migration of transactional data will not be possible
Ongoing
Required for the initial data transfer
Migration of transactional data will be possible
Completed
After successful initial data transfer
Migration of transactional data will not be possible

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_DMC_SIN446 - Migration key date for company code &1 has already status 'Completed' ?

  The SAP error message CNV_DMC_SIN446 indicates that the migration key date for a specific company code has already been set to a status of 'Completed'. This typically occurs during the data migration process when using the SAP Data Migration Cockpit or similar tools.
  Cause:
  
  Migration Process Already Completed: The migration for the specified company code has already been executed and marked as completed. This means that the system does not allow any further changes or re-execution of the migration for that particular key date.
  Incorrect Key Date: The key date you are trying to set or modify may already exist in the system with a completed status.
  Data Integrity: The system is designed to prevent changes to completed migrations to maintain data integrity and consistency.
  
  Solution:
  
  Check Migration Status: Verify the status of the migration for the company code in question. You can do this by navigating to the relevant migration cockpit or transaction where the migration status is displayed.
  Use a Different Key Date: If you need to perform another migration, consider using a different key date that has not been marked as completed.
  Revert Migration Status: If you need to redo the migration for the same key date, you may need to revert the status of the migration. This typically requires administrative access and should be done with caution, as it may affect data integrity.
  Consult Documentation: Refer to the SAP documentation or migration guides for specific instructions on handling migration key dates and statuses.
  Contact SAP Support: If you are unable to resolve the issue, consider reaching out to SAP support for assistance. They can provide guidance based on your specific system configuration and migration scenario.
  
  Related Information:
  
  Migration Cockpit: Familiarize yourself with the SAP Data Migration Cockpit, as it provides tools and functionalities for managing data migration processes.
  Transaction Codes: Depending on your SAP version, you may use specific transaction codes (like LTMC for the Migration Cockpit) to check migration statuses.
  Data Migration Best Practices: Review best practices for data migration to avoid issues related to key dates and migration statuses in the future.
  
  By following these steps, you should be able to address the CNV_DMC_SIN446 error and proceed with your migration tasks effectively.