How To Fix CNV20200147 - There exist already mapping entries

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV20200 - Messages for development class CNV_20200

• Message number: 147

• Message text: There exist already mapping entries

Self-Explanatory Message

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• What is the cause and solution for SAP error message CNV20200147 - There exist already mapping entries ?

  The SAP error message CNV20200147, which states "There exist already mapping entries," 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 are already existing mapping entries in the system for the data you are trying to import or convert, which can lead to conflicts or duplication.
  Cause:
  
  Duplicate Mapping Entries: The most common cause of this error is that the mapping entries you are trying to create already exist in the target system. This can happen if the migration process has been run previously or if there are overlapping data sets.
  Incorrect Data Preparation: If the source data has not been properly prepared or cleaned, it may lead to attempts to create mappings that already exist.
  Configuration Issues: There may be issues with the configuration of the migration project or the mapping settings that lead to conflicts.
  
  Solution:
  
  Check Existing Mappings: Before running the migration again, check the existing mapping entries in the target system. You can do this by accessing the relevant transaction or using the migration cockpit to review the mappings.
  Remove or Update Existing Entries: If you find that there are existing mappings that are no longer needed or are incorrect, you can remove or update them as necessary. Ensure that you have backups or documentation of the existing mappings before making changes.
  Adjust Source Data: Review the source data to ensure that it does not contain duplicates or conflicts that could lead to this error. Clean and prepare the data accordingly.
  Use Unique Identifiers: Ensure that the data being migrated has unique identifiers to prevent conflicts with existing entries.
  Consult Documentation: Refer to the SAP documentation for the specific migration tool you are using for any additional troubleshooting steps or best practices.
  Log Analysis: Check the logs generated during the migration process for more detailed error messages that can provide insights into the specific cause of the conflict.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on handling mapping entries.
  Migration Cockpit Documentation: Review the official SAP documentation for the Migration Cockpit or the specific tool you are using for data migration, as it may contain specific instructions or troubleshooting tips.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to resolve the CNV20200147 error and successfully complete your data migration or conversion process.