How To Fix CNV_20100299 - Group &1 is not unique after the conversion

CNV_20100299 - Overview

• Message type: E = Error

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

• Message number: 299

• Message text: Group &1 is not unique after the conversion

What causes this issue?

A group is unique if it only contains each subgroup and each value once.
Value intervals may not overlap each other.
The program found that after the conversion the group &V1& is not unique
any longer.
This is due to the conversion of the two old intervals &V3& into the two
new intervals &V4&. These new intervals are overlapping:
Old intervals: &V3&
New intervals: &V4&

System Response

The system only allows the display of ambiguous groups (not
maintenance).

How to fix this error?

To remove ambiguity, proceed as follows:
Resolve Set intervals by using the optional process tree activity
Alternatively
Call transaction KAH3 after the conversion
Choose Extras -> Ambiguity check. The system displays all of the groups
and values which occur more than once , and all overlapping values.
Remove these groups, values, and overlapping values by processing the
affected groups directly

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

If the standard hierarchy is affected, the compare function enables you
to compare the master data (Extras menu).

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

CNV_20100299 - Details

• The SAP error message CNV_20100299 indicates that during a data conversion process, a group (identified by &1) is not unique. This typically occurs in the context of data migration or conversion projects, particularly when using SAP's tools for data transformation, such as the SAP S/4HANA Migration Cockpit or other data conversion tools.
  
  Cause:
  The error arises when the system detects that there are multiple entries in the target system that correspond to the same group identifier. This can happen due to:
  
  Duplicate Data: There may be duplicate records in the source data that are being migrated.
  Mapping Issues: The mapping rules defined for the conversion may not be correctly set up, leading to multiple source records being mapped to the same target group.
  Data Integrity Issues: There may be inconsistencies in the data that violate the uniqueness constraints of the target system.
  
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Identify Duplicates: 
  
  Check the source data