How To Fix CNV_20800200 - Customer &1 (to be converted) is already mapped to another value: &3

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20800 - Message class for CNV_20800

• Message number: 200

• Message text: Customer &1 (to be converted) is already mapped to another value: &3

What causes this issue?

Your mapping table contains the following entry: &V1& -> &V2&
However there is also another mapping for &V1& -> &V3&.

System Response

The system does not accept this row.

How to fix this error?

Check the mapping and decide which of the two values you want to be the
target value for &V1&.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20800200 - Customer &1 (to be converted) is already mapped to another value: &3 ?

  The SAP error message CNV_20800200 indicates that during a data conversion process, a customer (identified by &1) is already mapped to another value (identified by &3). This typically occurs in the context of data migration or conversion projects, particularly when using SAP's Conversion Tools or during system upgrades.
  Cause:
  
  Duplicate Mapping: The customer record you are trying to map is already associated with a different value in the conversion mapping table. This can happen if there are overlapping or conflicting mappings in the data conversion process.
  Data Integrity Issues: There may be inconsistencies in the source data, such as duplicate customer entries or incorrect mappings that have not been resolved prior to the conversion.
  Configuration Errors: Incorrect configuration settings in the conversion tool or migration project can lead to this error.
  
  Solution:
  
  Review Mapping Entries: Check the mapping table or configuration settings to identify where the customer &1 is already mapped. You may need to resolve the conflict by either changing the mapping or ensuring that the customer is uniquely mapped.
  Data Cleansing: Ensure that the source data is clean and does not contain duplicates. You may need to perform data cleansing operations to remove or consolidate duplicate customer records.
  Adjust Mapping Logic: If the mapping logic is incorrect, adjust it to ensure that each customer is mapped to a unique value. This may involve modifying the transformation rules or logic used in the conversion process.
  Consult Documentation: Refer to the SAP documentation or notes related to the specific conversion tool you are using for any additional guidance or troubleshooting steps.
  Testing: After making changes, run a test conversion to ensure that the issue is resolved and that there are no further mapping conflicts.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context on handling customer mappings during conversion.
  Conversion Tools: Familiarize yourself with the specific SAP conversion tools being used (e.g., SAP S/4HANA Migration Cockpit, SAP Data Services) and their documentation for best practices in data mapping and conversion.
  Support: If the issue persists, consider reaching out to SAP Support for assistance, providing them with detailed information about the error and the steps you have taken to resolve it.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve the mapping conflict.