How To Fix CNV20333019 - New derivation. Existing mapping will be overwritten

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV20333 - Message class for package 20333 (OBJID_VD)

• Message number: 019

• Message text: New derivation. Existing mapping will be overwritten

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV20333019 - New derivation. Existing mapping will be overwritten ?

  The SAP error message CNV20333019 typically occurs during the data migration process, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This message indicates that a new derivation is being created, and it will overwrite an existing mapping. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  Duplicate Mapping: The error arises when there is an attempt to create a new mapping for a data field that already has an existing mapping in the system. This can happen if the same source data is being mapped to multiple target fields or if there are conflicting rules for data transformation.
  Configuration Issues: There may be issues in the configuration of the migration project, such as incorrect settings or parameters that lead to conflicts in the mapping definitions.
  
  Solution:
  
  Review Existing Mappings: Check the existing mappings in the migration cockpit or the relevant configuration area. Identify the mappings that are causing the conflict and determine if they need to be modified or deleted.
  Modify New Derivation: If the new derivation is necessary, consider modifying it to avoid overwriting the existing mapping. This may involve changing the source or target fields or adjusting the transformation logic.
  Consult Documentation: Refer to the SAP documentation for the specific migration tool you are using. There may be guidelines on how to handle mapping conflicts.
  Testing: Before finalizing the migration, conduct thorough testing to ensure that the mappings work as intended and that no critical data is lost or incorrectly transformed.
  Backup Existing Mappings: If possible, back up the existing mappings before making changes. This allows you to restore them if needed.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on handling mapping issues.
  Migration Cockpit Documentation: Review the official SAP documentation for the Migration Cockpit, which may provide insights into best practices for mapping and data transformation.
  Community Forums: Engage with the SAP Community or forums where other users may have encountered similar issues. They may share their experiences and solutions.
  
  By following these steps, you should be able to resolve the CNV20333019 error and successfully manage your data migration process.