How To Fix CNV_DMC_SIN404 - Update or enhance of already existing record &1 is not allowed

CNV_DMC_SIN404 - Overview

• Message type: E = Error

• Message class: CNV_DMC_SIN - Messages for s-innovations migration

• Message number: 404

• Message text: Update or enhance of already existing record &1 is not allowed

What causes this issue?

You transferred a value in one of the fields provided on sheet 'General
Data', but the customer master &V1& already exists.

System Response

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?

It is not allowed to change or enhance an already existing record in the
related customer master. You can use the Mass Maintenance APP for this.
For further information, refer to online documentation of the Mass
Maintenance APP.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

CNV_DMC_SIN404 - Details

• The SAP error message CNV_DMC_SIN404 indicates that there is an attempt to update or enhance an already existing record in a way that is not permitted. This error typically arises in the context of data migration or data conversion processes, particularly when using the SAP Data Migration Cockpit (DMC) or similar tools.
  
  Cause:
  
  Record Already Exists: The error occurs when the system detects that the record you are trying to update already exists in the target database, and the operation you are attempting is not allowed for existing records.
  Data Migration Rules: There may be specific rules or constraints defined in the data migration process that prevent updates to existing records.
  Key Violations: The operation may violate primary key or unique constraints in the target table.
  Incorrect Mapping: The mapping of fields between the source and target systems may not be correctly defined, leading to conflicts.
  
  
  Solution:
  
  Check Existing Records: Before attempting to update or enhance records,