How To Fix CNV_20100084 - Target account &2 exists already; 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: 084

• Message text: Target account &2 exists already; implicit merge by account rename

What causes this issue?

When the G/L accounts that you plan to merge were checked, it was found
that target account &V2& (mapping &V1& -> &V2&) already exists in the
database.
However target account &V2& is not used as a source account (&V2& ->
XXXX) for another mapping relation.
This means that account &V1& is in fact merged with existing account
&V2& at chart of accounts-dependent G/L account master data level (SKA1,
A level) as well as at company code-dependent G/L account master data
level (SKB1, B level).

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

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 &V2& -> &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 &V2& are merged into &V2&.

How to fix this error?

<ZH>Regarding item 2:</>
Explicitely include the mapping &V2& -> &V2& into the mapping table so
that at least the following entries exist in the mapping table:
&V1& -> &V2&
&V2& -> &V2&
If applicable, any other mapping 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 for which &V2& is the
target account.
&NOTE&
It is possible to do the conversion without setting the priority
indicator. However then it is undefined which source account settings
the target account &V2& will get.
In this case you should check the settings in A segment (master data in
chart of accounts, transaction FSP3) and B segment (master data in
company code, transaction FSS3) for the relevant 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_20100084 - Target account &2 exists already; implicit merge by account rename ?

  The SAP error message CNV_20100084 indicates that during a data migration or conversion process, the target account specified already exists in the system. This situation typically arises when you are trying to migrate financial data, and the system detects that the target account you are trying to create or update is already present.
  Cause:
  
  Duplicate Accounts: The target account you are trying to create already exists in the system.
  Data Migration Issues: During the data migration process, there may be overlapping data or misconfigured mappings that lead to attempts to create accounts that already exist.
  Implicit Merge: The system is attempting to merge the data into the existing account instead of creating a new one, which can lead to confusion if not handled properly.
  
  Solution:
  
  Check Existing Accounts: Before running the migration, check the target system for existing accounts. You can do this by querying the relevant tables (e.g., SKA1 for G/L accounts).
  Adjust Mapping: If you find that the account already exists, you may need to adjust your mapping in the migration tool to ensure that the data is directed to the correct existing account.
  Use Account Renaming: If the existing account should be merged with the new data, consider using account renaming or merging strategies to consolidate the accounts properly.
  Review Migration Logs: Check the migration logs for additional details on the error and any related warnings or messages that could provide more context.
  Consult Documentation: Refer to SAP documentation or notes related to the specific migration tool you are using (e.g., SAP S/4HANA Migration Cockpit) for best practices and troubleshooting steps.
  
  Related Information:
  
  Transaction Codes: You may want to use transaction codes like SE16 or SE11 to view the relevant tables and data.
  SAP Notes: Look for SAP Notes related to the CNV_20100084 error for any specific patches or updates that may address this issue.
  Data Migration Tools: Familiarize yourself with the data migration tools provided by SAP, such as the SAP S/4HANA Migration Cockpit, which may have specific guidelines for handling account merges and duplicates.
  
  By following these steps, you should be able to resolve the error and successfully complete your data migration process.