How To Fix CNV_20800224 - Duplicate customer number check:

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20800 - Message class for CNV_20800

• Message number: 224

• Message text: Duplicate customer number check:

What causes this issue?

This check is performed on the old customer numbers maintained in
mapping. If two records maintained with the same old customer number in
mapping, then you can see an error message in the logs.
For example: A -> B and A -> C maintained in mapping
This scenario is not supported by this Package.

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

System Response

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_20800224 - Duplicate customer number check: ?

  The SAP error message CNV_20800224 typically indicates that there is a duplicate customer number in the system during a data migration or conversion process. This error is often encountered when using SAP's data migration tools, such as the SAP S/4HANA Migration Cockpit or other data transfer methods.
  Cause:
  The error occurs when the system detects that the customer number being processed already exists in the target system. This can happen due to:
  
  Duplicate entries in the source data.
  Incorrect mapping of customer numbers during the migration process.
  Data from multiple sources being merged, leading to conflicts in customer numbers.
  
  Solution:
  To resolve the CNV_20800224 error, you can follow these steps:
  
  
  Identify Duplicates:
  
  Check the source data for duplicate customer numbers. You can use tools like Excel or SQL queries to identify duplicates in your source data.
  
  
  
  Review Mapping:
  
  Ensure that the mapping of customer numbers from the source to the target system is correct. If you are using a migration tool, verify the mapping configuration.
  
  
  
  Data Cleansing:
  
  Cleanse the data to remove duplicates or consolidate customer records as necessary. This may involve merging records or assigning new unique customer numbers.
  
  
  
  Adjust Migration Settings:
  
  If applicable, adjust the settings in the migration tool to handle duplicates. Some tools may have options to skip duplicates or to update existing records instead of creating new ones.
  
  
  
  Test Migration:
  
  Before performing a full migration, conduct a test migration with a smaller dataset to ensure that the issue is resolved.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or notes related to the specific migration tool you are using for additional guidance on handling duplicates.
  
  
  
  Seek Support:
  
  If the issue persists, consider reaching out to SAP support or consulting with an SAP expert who can provide more tailored assistance based on your specific scenario.
  
  
  
  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 tool you are using, as different tools may have different ways of handling duplicates.
  Data Governance: Implement data governance practices to prevent duplicate entries in the future, such as regular data audits and validation processes.
  
  By following these steps, you should be able to resolve the CNV_20800224 error and successfully complete your data migration.