How To Fix CNV_20320_CHECK010 - Double mapping entry provided for source COAr &1 activity type &2

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20320_CHECK - Messages for check functions (Activity Types merge)

• Message number: 010

• Message text: Double mapping entry provided for source COAr &1 activity type &2

What causes this issue?

A specified source value in the mapping is assigned to multiple target
values. To run the transformation solution all source mapping values
must have exactly one target value.
You cannot run the transformation solution <ZK>Controlling Area Merge</>
because certain prerequisites have not been met. Please change your
mapping accordingly.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20320_CHECK010 - Double mapping entry provided for source COAr &1 activity type &2 ?

  The SAP error message CNV_20320_CHECK010 indicates that there is a double mapping entry for a source activity type in the context of a conversion or migration process, specifically related to the CO (Controlling) area. This error typically arises during data migration activities, such as when using the SAP S/4HANA Migration Cockpit or other data migration tools.
  Cause:
  The error occurs when there are multiple mapping entries for the same source activity type in the mapping table. This can happen due to:
  
  Duplicate Entries: There are duplicate entries in the mapping configuration for the specified activity type.
  Incorrect Configuration: The mapping configuration may not have been set up correctly, leading to multiple mappings for the same source.
  Data Integrity Issues: The source data may have inconsistencies or duplicates that are causing the mapping tool to interpret them as multiple entries.
  
  Solution:
  To resolve the error, you can follow these steps:
  
  
  Check Mapping Configuration:
  
  Go to the mapping configuration in the migration tool you are using.
  Look for the entries related to the specified CO area and activity type.
  Identify any duplicate entries and remove or consolidate them as necessary.
  
  
  
  Review Source Data:
  
  Examine the source data for the specified activity type to ensure there are no duplicates or inconsistencies.
  Clean up the source data if necessary to ensure that each activity type is uniquely mapped.
  
  
  
  Adjust Mapping Logic:
  
  If the mapping logic is complex, consider revising it to ensure that it correctly handles the source data without creating duplicates.
  
  
  
  Test the Changes:
  
  After making adjustments, run the migration process again to see if the error persists.
  Monitor for any other related errors that may arise.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to the specific migration tool you are using for any additional guidance or best practices.
  
  
  
  Related Information:
  
  Transaction Codes: Depending on the migration tool, you may use transaction codes like LTMC (for Migration Cockpit) or LTMOM (for Migration Object Modeler) to access mapping configurations.
  SAP Notes: Check for any relevant SAP Notes that may address known issues or provide additional troubleshooting steps related to this error.
  Community Forums: Consider searching or posting in SAP community forums for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify and resolve the cause of the CNV_20320_CHECK010 error in your SAP environment.