How To Fix CNV_DMC_SIN336 - Changing of already existing values is not allowed

CNV_DMC_SIN336 - Overview

• Message type: E = Error

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

• Message number: 336

• Message text: Changing of already existing values is not allowed

What causes this issue?

You transferred the value &V1& in one of the fields provided on sheet
'Basic Data' which has already an existing value &V2& in the related
material master &V3&.

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 already existing values in the related
material master: Therefor you can use the Mass Maintenance App. 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_SIN336 - Details

• The SAP error message CNV_DMC_SIN336 ("Changing of already existing values is not allowed") typically occurs during data migration or data conversion processes, particularly when using the SAP Data Migration Cockpit (DMC) or similar tools. This error indicates that the system is trying to change values in a target table that are already populated, which is not permitted under the current configuration or rules of the migration process.
  
  Cause:
  
  Existing Data Conflict: The target table already contains data that conflicts with the incoming data from the source. The migration process is attempting to insert or update records that already exist in the target system.
  Configuration Settings: The migration settings may be configured to prevent updates to existing records, allowing only new records to be created.
  Data Mapping Issues: There may be issues with how the source data is mapped to the target structure, leading to attempts to overwrite existing values.
  
  
  Solution:
  
  Review Existing Data: Check the target