How To Fix CNV_20100194 - Target cost element &2 already exists, implicit merge by CoA rename

CNV_20100194 - Overview

• Message type: E = Error

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

• Message number: 194

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

What causes this issue?

When checking the cost elements that you plan to merge, the system found
that as a result of the chart of accounts change cost element &V1& will
be changed into target cost element &V2&.
However target cost element &V2& already exists in the database.
Target cost element &V2& itself is not used as a source cost element (
&V2& -> XXXX) for another mapping relation or for an account merge.
This means that cost element &V1& is in fact merged with existing cost
element &V2& at <DS:TX.CNV_20100_TX_ASEGMENT>A level</>.
If the priority indicator is not set, it is not clear which settings
will take priority when cost elements &V1& and &V2& are merged into &V2&
. As the affected fields contain only additional information, such as
the creation date and the person who created he cost element, it is
acceptable to merge the cost elements without a priority.
For cost elements, a check for logical correctness at A level is
required. A merge can be done without any problems. At
<DS:TX.CNV_20100_TX_BSEGMENT>B level</>, the mapping (&V1& -> &V2&) will
not result in a merge (each cost element exists only once in the
controlling area). For this reason, it is not necessary to make any
temporary additions to the mapping table.

How to fix this error?

This message is meant to inform you that you are doing an implicit merge
of cost elements by changing the 'chart of accounts' field at A level.
If you want to define which settings will take priority at A level,
include the mapping &V2& -> &V2& in the mapping table so that it
includes at least the following entries:
&V1& -> &V2&
&V2& -> &V2&
If necessary, any other mapping with target cost element &V2&.
Set the prio indicator for one of the entries with target cost element
&V2& .

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

&NOTE&
As described above, you can also do without these entries. In this case,
you may want to check the settings for A segment (table CSKA, chart of
accounts-dependent data for cost elements) for the relevant cost element
&V2& after the conversion.
&ADDITIONAL_HINTS&
Note that you must not set the priority indicator 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_20100194 - Details

• The SAP error message CNV_20100194 indicates that there is a conflict with the target cost element during a data migration or conversion process. Specifically, it means that the target cost element (identified by &2) already exists in the system, and the system is attempting to perform an implicit merge due to a Chart of Accounts (CoA) rename.
  
  Cause:
  
  Duplicate Cost Element: The target cost element you are trying to create or migrate already exists in the system. This can happen if the same cost element is being used in multiple contexts or if there was a previous migration that created it.
  Chart of Accounts Rename: If the Chart of Accounts has been renamed or modified, it can lead to conflicts where the system tries to merge cost elements that are supposed to be distinct but are now being treated as the same due to the rename.
  
  
  Solution:
  
  
  Check Existing Cost Elements: Before proceeding with the