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

CNV_20100184 - Overview

• 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.

CNV_20100184 - Details

• 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