How To Fix CNV_2010C066 - This 'Mapped ID' already exists in the system. Please assign another one

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_2010C - Message class for CoA on Cloud

• Message number: 066

• Message text: This 'Mapped ID' already exists in the system. Please assign another one

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_2010C066 - This 'Mapped ID' already exists in the system. Please assign another one ?

  The SAP error message CNV_2010C066 indicates that there is an attempt to create or map an ID that already exists in the system. This error typically arises during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools.
  Cause:
  
  Duplicate Mapping: The error occurs when the system detects that the ID you are trying to map or create is already associated with another entity in the system.
  Data Integrity Issues: There may be issues with the data being imported, such as duplicates in the source data that are not being handled correctly.
  Configuration Errors: Incorrect configuration settings in the migration tool or mapping settings can lead to this error.
  
  Solution:
  
  
  Check Existing IDs: Verify the existing IDs in the target system to ensure that the ID you are trying to use is not already in use. You can do this by querying the relevant tables or using transaction codes that allow you to view the existing records.
  
  
  Modify the Mapping: If you find that the ID is indeed in use, you will need to either:
  
  Change the ID in your source data to a unique value that does not conflict with existing IDs.
  Adjust the mapping configuration to use a different ID.
  
  
  
  Data Cleansing: If the source data contains duplicates, perform data cleansing to remove or consolidate duplicate entries before attempting the migration again.
  
  
  Review Migration Settings: Check the settings in the migration tool to ensure that they are configured correctly and that there are no rules or settings that might be causing the duplication.
  
  
  Consult Documentation: Refer to the SAP documentation related to the specific migration tool you are using for any additional guidelines or troubleshooting steps.
  
  
  Testing: After making the necessary changes, conduct a test migration with a smaller dataset to ensure that the issue is resolved before proceeding with the full migration.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context or solutions.
  Community Forums: Engage with SAP community forums or support channels where other users may have encountered and resolved similar issues.
  SAP Support: If the issue persists and you are unable to resolve it, consider reaching out to SAP Support for assistance.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.