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

SAP Error Message - Details

• 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.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20100299 - Group &1 is not unique after the conversion ?

  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 for duplicates. You can use SQL queries or data analysis tools to identify records that have the same group identifier.
  Use transaction codes like SE16 or SE11 to analyze the relevant tables.
  
  
  
  Review Mapping Rules:
  
  Review the mapping rules defined in the conversion project. Ensure that each source record is mapped correctly to a unique target group.
  Adjust the mapping if necessary to ensure that it maintains uniqueness.
  
  
  
  Data Cleansing:
  
  Cleanse the source data to remove duplicates or consolidate records as needed before the conversion.
  This may involve merging records or deciding which record to keep based on business rules.
  
  
  
  Adjust Target Configuration:
  
  If applicable, consider adjusting the target system's configuration to allow for non-unique entries, but this should be done with caution as it may lead to further data integrity issues.
  
  
  
  Re-run the Conversion:
  
  After making the necessary adjustments, re-run the conversion process to see if the error persists.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes like SE16 (Data Browser), SE11 (Data Dictionary), and others that can help you analyze the data.
  SAP Notes: Check SAP Notes for any specific guidance or patches related to the CNV_20100299 error.
  Documentation: Review the documentation for the specific data conversion tool you are using, as it may provide additional insights or troubleshooting steps.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to ensure a successful data conversion.