How To Fix CNV_10100257 - New set name &1 for set &2 &3 &4 already exists in target sub class

CNV_10100257 - Overview

• Message type: E = Error

• Message class: CNV_10100 - Messages from package 10100

• Message number: 257

• Message text: New set name &1 for set &2 &3 &4 already exists in target sub class

What causes this issue?

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?

Assign a new unique set name.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

CNV_10100257 - Details

• The SAP error message CNV_10100257 typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that there is an attempt to create a new set name in the target subclass that already exists, leading to a conflict.
  
  Cause:
  The error is caused by the following scenarios:
  
  Duplicate Set Names: The target system already contains a set with the same name that you are trying to create. This can happen if the migration process is being run multiple times or if there are overlapping data sets.
  Incorrect Mapping: There may be an issue with the mapping of data from the source to the target, leading to attempts to create duplicate entries.
  Data Consistency Issues: If the data in the source system is not consistent or has duplicates, it can lead to conflicts during the migration.
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check