How To Fix CNV_20100184 - Target account &2 exists already, implicit merge by CoA rename

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 184

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

What causes this issue?

When checking the G/L accounts you want to merge, the system found that
as a result of the chart of accounts change the account &V1& will be
changed into target account &V2&.
However target account &V2& already exists in the database.
Target account &V2& itself is not used as the source account (&V2& ->
XXXX) for another mapping or for a merge of accounts.
This means that account &V1& is implicitly merged with existing account
&V2& at <DS:TX.CNV_20100_TX_ASEGMENT>A level</>.
At <DS:TX.CNV_20100_TX_BSEGMENT>B level</>, however, the mapping (&V1&
-> &V2&) will not result in a merge (G/L account number is not changed).
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 &V1& -> &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 the accounts
&V1& and &V2& 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 &V1& -> &V2& in 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 with target account
&V2&.
&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 the 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_20100184 - Target account &2 exists already, implicit merge by CoA rename ?

  The SAP error message CNV_20100184 indicates that during a data migration or conversion process, a target account already exists in the system. This typically occurs when using the SAP Conversion or Migration tools, particularly in the context of a Chart of Accounts (CoA) rename or mapping process.
  Cause:
  The error arises when:
  
  The target account specified in the migration process already exists in the system.
  The system is attempting to create a new account that conflicts with an existing one, leading to an implicit merge operation.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Existing Accounts:
  
  Verify if the target account (&2 in the error message) already exists in the system. You can do this by checking the relevant tables or using transaction codes like FS00 (G/L Account Master Record) to see if the account is already defined.
  
  
  
  Review Mapping:
  
  Review the mapping of accounts in your migration or conversion tool. Ensure that the mapping does not inadvertently point to an existing account unless that is the intended behavior.
  
  
  
  Adjust Migration Settings:
  
  If the existing account is correct and should be retained, you may need to adjust your migration settings to avoid creating a duplicate. This could involve changing the mapping or renaming the account in the source data.
  
  
  
  Implicit Merge Handling:
  
  If the implicit merge is acceptable (i.e., you want to combine the data from the source account into the existing target account), ensure that the migration process is set up to handle this correctly. This may involve configuring the migration tool to allow for merges.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation related to the specific migration tool you are using (e.g., SAP S/4HANA Migration Cockpit, SAP Data Services) for detailed instructions on handling account merges and conflicts.
  
  
  
  Testing:
  
  After making adjustments, perform a test migration to ensure that the error does not reoccur and that the data is migrated as expected.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as FS00 for G/L account maintenance, OBY6 for managing Chart of Accounts, and OBD2 for account assignment.
  SAP Notes: Check for any SAP Notes related to the error message or the migration process you are using. SAP Notes often provide specific fixes or workarounds for known issues.
  Community Forums: Engage with SAP community forums or support channels for additional insights or similar experiences from other users.
  
  By following these steps, you should be able to address the error CNV_20100184 effectively.