How To Fix CNV_20100129 - Problem due to conversion to existing set &1, &2, &3

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20100 - Messageclass for chart of account conversion

• Message number: 129

• Message text: Problem due to conversion to existing set &1, &2, &3

What causes this issue?

When simulating the set rename, the system found that an old set would
be converted into an existing set &V1&, set class &V2&, subclass &V3&.

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

System Response

This would amount to merging the sets, which is not allowed.

How to fix this error?

Check your entries in the activity <ZK>Maintain Dupl. CostEl Grps/PRCTR
Acct Grps/Intervals/Sets</> and change the mapping accordingly.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20100129 - Problem due to conversion to existing set &1, &2, &3 ?

  The SAP error message CNV_20100129 typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that there is a problem with the conversion of data to an existing set, which can be due to various reasons.
  Cause:
  
  Duplicate Entries: The error often arises when there are duplicate entries in the source data that conflict with existing entries in the target system.
  Data Integrity Issues: There may be issues with data integrity, such as missing required fields or invalid data formats.
  Mapping Issues: The mapping of fields from the source to the target may not be correctly defined, leading to conflicts.
  Existing Data Conflicts: The target system may already contain data that conflicts with the incoming data, such as primary key violations.
  
  Solution:
  
  Check for Duplicates: Review the source data for duplicates that may conflict with existing records in the target system. Remove or consolidate duplicates as necessary.
  Data Validation: Ensure that the data being migrated meets all the integrity constraints of the target system. This includes checking for required fields, valid data types, and acceptable value ranges.
  Review Mapping: Verify the mapping configuration in the migration tool to ensure that all fields are correctly aligned and that there are no mismatches.
  Pre-Load Checks: Perform pre-load checks to identify potential conflicts before executing the migration. This can help catch issues early in the process.
  Error Logs: Check the detailed error logs provided by the migration tool for more specific information about the records causing the issue. This can help pinpoint the exact problem.
  Consult Documentation: Refer to SAP documentation or notes related to the specific migration tool you are using for additional troubleshooting steps or known issues.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on data migration issues.
  Migration Cockpit: Familiarize yourself with the SAP S/4HANA Migration Cockpit and its functionalities, as it provides tools for data mapping, validation, and error handling.
  Data Migration Best Practices: Follow best practices for data migration, including thorough testing in a sandbox environment before executing in production.
  
  If the issue persists after following these steps, it may be beneficial to engage with SAP support or a consultant who specializes in data migration to assist in resolving the error.