How To Fix CNV_MBT055 - Destination_id &1 already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_MBT - PCL message class

• Message number: 055

• Message text: Destination_id &1 already exists

The RFC destination ID you entered already exists in the system.
Choose a different ID.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_MBT055 - Destination_id &1 already exists ?

  The SAP error message CNV_MBT055 with the description "Destination_id &1 already exists" typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that there is an attempt to create a destination ID that already exists in the system.
  Cause:
  
  
  Duplicate Entry: The most common cause of this error is that the destination ID you are trying to create or use is already present in the database. This can happen if:
  
  The migration process is being run multiple times without proper cleanup.
  There is a configuration or mapping issue that leads to the same destination ID being generated for different records.
  
  
  
  Incorrect Configuration: If the migration or conversion settings are not correctly configured, it may lead to attempts to create duplicate destination IDs.
  
  
  Solution:
  
  
  Check Existing Entries: 
  
  Use transaction codes like SE11 (Data Dictionary) or SE16 (Data Browser) to check the relevant tables for existing destination IDs. Identify if the ID you are trying to create already exists.
  
  
  
  Modify or Remove Duplicates:
  
  If you find that the destination ID already exists and is not needed, you can delete or modify the existing entry to resolve the conflict.
  If the existing entry is required, consider using a different destination ID for your new entry.
  
  
  
  Adjust Migration Settings:
  
  Review the migration settings or mapping configurations to ensure that they are set up correctly and do not lead to duplicate entries.
  
  
  
  Run Cleanup Jobs:
  
  If the migration process has been run multiple times, consider running cleanup jobs or transactions to clear out any temporary or incomplete entries that may be causing the conflict.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation or notes related to the specific migration tool you are using for any additional troubleshooting steps or best practices.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE11, SE16, and others that can help you investigate the database.
  SAP Notes: Check SAP Notes for any known issues or patches related to the CNV_MBT055 error.
  Migration Cockpit: If you are using the SAP S/4HANA Migration Cockpit, review the migration guide for specific instructions on handling destination IDs and data mapping.
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance, providing them with detailed information about the error and the context in which it occurs.