How To Fix CNV_20100205 - CoA merge: Source account &1 exists; implicit merge by account rename

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 205

• Message text: CoA merge: Source account &1 exists; implicit merge by account rename

What causes this issue?

The planned chart of accounts merge will lead to implicit merges of
accounts.
The check of the G/L accounts that will be merged showed that source
account &V1& will be converted into &V2& (mapping &V1& -> &V2&).
Another source account &V3& already exists in the database and will also
be merged into target account &V2& as a consequence of the chart of
accounts change into &V4&.
This means that account &V1& will implicitly be merged with existing
account &V3& at <DS:TX.CNV_20100_TX_ASEGMENT>A level</>. At
<DS:TX.CNV_20100_TX_BSEGMENT>B level</>, the mapping will not result in
a merge because the charts of accounts that will be merged are
necessarily assigned to different company codes.
This has the following consequences. You need:
to find out if the implicit merge is correct from a logical point of
view.
to explicitely include the entry &V3& -> &V2& to the mapping
to consider the priority indicator. If the priority indicator is not
set, it is not clear which settings will take priority when accounts
&V1& and &V3& are merged into &V2&.

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

How to fix this error?

<ZH>Regarding item 2:</>
Explicitely include the mapping &V3& -> &V2& in the mapping table so
that at least the following entries exist in the mapping table:
&V1& -> &V2&
&V3& -> &V2&
If necessary, any others with target account &V2&.
This allows the system to check the merge for logical correctness.
A troubleshooting activity is associated to this activity which supports
you in creating the required mapping entries to resolve the implicit
merges.
<ZH>Regarding item 3:</>
Set the priority indicator for one of the entries with target account
&V2&.
&NOTE&
It is possible to do the conversion without setting the priority
indicator. However then you should check the A segment settings (master
data in chart of accounts, transaction FSP3) for the account &V2& after
the conversion.
&ADDITIONAL_HINTS&
The priority indicator must not be set more than <ZH>once</> for all
merges to a given target account. This is also valid for cross-chart of
accounts merges.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20100205 - CoA merge: Source account &1 exists; implicit merge by account rename ?

  The SAP error message CNV_20100205 is related to the conversion process in SAP, particularly during the merging of Chart of Accounts (CoA). This error indicates that there is a conflict where a source account already exists in the target system, and the system is attempting to perform an implicit merge due to an account rename.
  Cause:
  
  Duplicate Accounts: The source account you are trying to merge already exists in the target Chart of Accounts. This can happen if the same account number is used in both the source and target systems.
  Account Renaming: The system is trying to rename the account in the target system to avoid duplication, which leads to this implicit merge process.
  Data Migration Issues: This error often arises during data migration or system conversion processes, where accounts from different systems are being consolidated.
  
  Solution:
  
  Review Account Mapping: Check the mapping of accounts between the source and target systems. Ensure that there are no conflicts in account numbers.
  Adjust Account Numbers: If possible, adjust the account numbers in the source system to avoid duplication before the merge process.
  Manual Merge: If the implicit merge is not suitable, consider manually merging the accounts in the target system. This may involve:
  
  Identifying the correct target account.
  Updating transactions to point to the correct account.
  Deleting or deactivating the duplicate account if it is no longer needed.
  
  
  Consult Documentation: Refer to SAP documentation or notes related to the specific migration or conversion process you are using. There may be specific guidelines or tools provided by SAP to handle such situations.
  Use Transaction Codes: Utilize transaction codes like OBY6 (for managing Chart of Accounts) to review and adjust account settings.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional guidance on handling Chart of Accounts merges.
  Data Migration Tools: If you are using SAP's data migration tools (like the SAP S/4HANA Migration Cockpit), ensure that you are following the recommended procedures for account mapping and merging.
  Testing: Always perform thorough testing in a development or sandbox environment before executing changes in the production system to avoid data integrity issues.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with an SAP expert or your technical support team for further assistance.