How To Fix CNV_20100252 - Implicit merge of G/L account &1 with secondary cost element &2

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 252

• Message text: Implicit merge of G/L account &1 with secondary cost element &2

What causes this issue?

The system found that the G/L account &V1& is converted into
&V3& (according to the mapping). However there is already a
secondary cost element &V2&, which is also going to be converted
into &V3&.

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

System Response

In effect, this means that a G/L account (&V1&) and a secondary cost
element (&V2&) are going to be merged. This is not allowed.
The conversion cannot take place.

How to fix this error?

The mapping table must be adjusted accordingly.

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_20100252 - Implicit merge of G/L account &1 with secondary cost element &2 ?

  The SAP error message CNV_20100252, which indicates an "Implicit merge of G/L account &1 with secondary cost element &2," typically arises during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error suggests that there is a conflict between a General Ledger (G/L) account and a secondary cost element, which may be due to inconsistencies in the mapping of accounts during the migration process.
  Cause:
  
  Account Mapping Issues: The G/L account and the secondary cost element may have been incorrectly mapped or defined in the system, leading to a conflict.
  Data Inconsistencies: There may be inconsistencies in the data being migrated, such as duplicate entries or incorrect account types.
  Configuration Errors: The configuration settings in the SAP system may not align with the expected mappings for G/L accounts and cost elements.
  
  Solution:
  
  Review Account Mapping: Check the mapping of G/L accounts and secondary cost elements in the migration tool. Ensure that they are correctly defined and that there are no duplicates.
  Data Validation: Validate the data being migrated to ensure that there are no inconsistencies or errors. This may involve checking for duplicate accounts or incorrect account types.
  Adjust Configuration: Review the configuration settings in the SAP system related to G/L accounts and cost elements. Make necessary adjustments to ensure they align with the migration requirements.
  Consult Documentation: Refer to SAP documentation or notes related to the specific migration process you are using. There may be specific guidelines or best practices to follow.
  Use Transaction Codes: Utilize transaction codes like OX15 (for G/L account creation) and KA01 (for cost element creation) to review and adjust the accounts as needed.
  Testing: After making adjustments, perform a test migration to see if the error persists. This can help identify if the changes resolved the issue.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on handling G/L account and cost element mappings.
  Migration Cockpit: Familiarize yourself with the SAP S/4HANA Migration Cockpit and its functionalities, as it provides tools for mapping and transforming data during migration.
  Community Forums: Engage with SAP community forums or support channels where other users may have encountered similar issues and can provide insights or solutions.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.