How To Fix CNV_20100264 - Implicit merge of secondary CostEl &1 with G/L acct &2 due to CoA change

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 264

• Message text: Implicit merge of secondary CostEl &1 with G/L acct &2 due to CoA change

What causes this issue?

The system found that the secondary cost element &V1& is converted into
&V3& in connection with the chart of accounts change. However there is
already a G/L account &V2&, which is also converted into &V3&.

System Response

In effect, this means that a secondary cost element (&V1&) and a G/L
account (&V2&) are going to be merged (implicit merge). 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

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20100264 - Implicit merge of secondary CostEl &1 with G/L acct &2 due to CoA change ?

  The SAP error message CNV_20100264 indicates that there is an implicit merge of secondary cost elements with a General Ledger (G/L) account due to a change in the Chart of Accounts (CoA). This typically occurs during data migration or when changes are made to the CoA structure in the SAP system.
  Cause:
  
  Chart of Accounts Change: The error arises when there is a change in the Chart of Accounts that affects the mapping of cost elements to G/L accounts. This can happen during a system upgrade, data migration, or when the CoA is modified.
  Cost Element Configuration: The secondary cost elements may not be properly mapped to the new G/L accounts, leading to conflicts or overlaps in the accounting entries.
  Data Migration Issues: If you are migrating data from one system to another, inconsistencies in the cost element and G/L account mapping can trigger this error.
  
  Solution:
  
  Review CoA Changes: Check the changes made to the Chart of Accounts. Ensure that the mappings for cost elements to G/L accounts are correctly defined.
  Adjust Cost Element Mapping: Go to the configuration settings for cost elements and verify that the secondary cost elements are correctly assigned to the appropriate G/L accounts in the new CoA.
  Data Migration Tools: If you are using data migration tools (like SAP S/4HANA Migration Cockpit), ensure that the mapping rules are correctly set up to handle the changes in the CoA.
  Consult Documentation: Refer to SAP documentation or notes related to the specific version you are using for any additional guidance on handling CoA changes and cost element mappings.
  Testing: After making adjustments, conduct thorough testing to ensure that the changes resolve the error and that financial reporting remains accurate.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like OBY6 (for CoA settings) and KA01 (for creating cost elements) to review and adjust settings.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context on handling CoA changes.
  Support: If the issue persists, consider reaching out to SAP support or consulting with an SAP expert who specializes in financial accounting and controlling (FI/CO) modules.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.