Message type: E = Error
Message class:  CNV_DMC_SIN - Messages for s-innovations migration 
Message number: 275
Message text: Organizational Data with combination: &1 &2 &3 already exists
With this object you can only add new sales data. You can't change
already existing entries.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Delete these records from the template or change your mapping.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV_DMC_SIN275 indicates that there is an attempt to create or insert organizational data (such as cost centers, profit centers, or other organizational units) that already exists in the system. This error typically arises during data migration or conversion processes, particularly when using the SAP Data Migration Cockpit or similar tools.
Cause: Duplicate Data: The most common cause of this error is that the organizational data you are trying to import already exists in the target system. This can happen if: The data was previously migrated and not properly cleaned up. There are overlapping data entries in the source and target systems. The migration process is being run multiple times without proper checks. Incorrect Mapping: If the mapping of the data from the source to the target system is incorrect, it may lead to attempts to create records that already exist. Data Integrity Issues: There may be issues with data integrity, such as missing
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