How To Fix CNV_20800021 - Merge to customer number &2

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20800 - Message class for CNV_20800

• Message number: 021

• Message text: Merge to customer number &2

What causes this issue?

The system found that you want to merge &V1& (and possibly others) into
the existing customer number &V2&.
This corresponds to the following merge:
&V1& -> &V2&
..........-> &V2&
&V2& -> &V2&

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20800021 - Merge to customer number &2 ?

  The SAP error message CNV_20800021, which states "Merge to customer number &2," typically occurs during data migration or data conversion processes, particularly when using the SAP Customer Migration tool. This error indicates that there is an issue with merging customer records, often due to inconsistencies or conflicts in the data being processed.
  Cause:
  
  Duplicate Customer Records: The error usually arises when there are duplicate customer records in the source data that need to be merged into a single customer number.
  Data Inconsistencies: There may be inconsistencies in the data fields of the customer records that prevent a successful merge.
  Missing Required Fields: If required fields for the customer records are missing or incorrectly populated, the merge process may fail.
  Configuration Issues: There could be configuration settings in the migration tool that are not set up correctly.
  
  Solution:
  
  Identify Duplicate Records: Use transaction codes like SE16 or SE11 to check the customer master data tables (e.g., KNA1) for duplicate entries.
  Data Cleansing: Clean the data by ensuring that duplicates are identified and resolved before the migration process. This may involve consolidating information from multiple records into a single record.
  Check Required Fields: Ensure that all required fields for customer records are populated correctly. This includes fields like customer name, address, and other relevant information.
  Review Migration Settings: Check the settings in the migration tool to ensure they are configured correctly for the merge process.
  Test the Merge Process: Before executing the full migration, conduct a test run with a smaller dataset to identify any potential issues.
  Consult Documentation: Refer to SAP documentation or notes related to the specific migration tool you are using for any additional guidance or troubleshooting steps.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Migration Tools: Familiarize yourself with the specific migration tools and processes being used, such as the SAP S/4HANA Migration Cockpit or other data migration solutions.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  If the problem persists after following these steps, it may be beneficial to reach out to SAP support for further assistance.