Message type: E = Error
Message class:  CNV_20212_CHECK - Messages for check functions (credit control area conv.) 
Message number: 054
Message text: Implicit merges due to mapping of credit control areas
<DS:TX.CNV_MBT_IMPLICIT_MERGE>Implicit merges</> due to mapping of
credit control areas.
If according to the mapping a credit control area is converted to a
credit control area that already exists, these two credit control areas
are merged. If the existing credit control area is not included in the
mapping, this is an <DS:TX.CNV_MBT_IMPLICIT_MERGE>implicit merge</>,
that is, a merge that is not defined directly (explicitly) in the
mapping, but follows implicitly from the mapping and the existing credit
control area.
Example: Credit control area A is renamed into B (mapping: A -> B).
However credit control area B exists already and is not meant to be
changed into another credit control area. This would amount to an
implicit merge of A and B. For these implicit merges, the same checks as
for explicit merges are required (mapping: A -> B; B -> B).
We require that all credit control areas are included in the mapping,
which are part of an identified implicit merge.
Error
You must also add credit control areas as source values to the mapping
if they are target values, and already exist before the conversion.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV_20212_CHECK054 typically arises during data migration processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that there are implicit merges occurring due to the mapping of credit control areas, which can lead to data inconsistencies or conflicts.
Cause: The error is generally caused by the following factors: Credit Control Area Mapping: When migrating data, if multiple customer or vendor records are mapped to the same credit control area, it can lead to implicit merges. This means that the system is trying to combine records that should remain distinct, which can cause issues in financial reporting and credit management. Data Overlap: If the source data contains overlapping or conflicting information regarding credit control areas, the migration process may not be able to handle these overlaps correctly.
Configuration Issues: Incorrect configuration of credit control areas in the target system can also lead to this error. If the
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