How To Fix CNV_MBT055 - Destination_id &1 already exists

CNV_MBT055 - Overview

• 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.

CNV_MBT055 - Details

• 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