Message type: E = Error
Message class:  CNV_DMC_SIN - Messages for s-innovations migration 
Message number: 517
Message text: Plant Data: &1 already exists
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
With object 'Product - extend existing record by new org levels' you can
only extend a product with new plant data. You can't change already
existing plant data.
Delete these records from the template/staging table.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV_DMC_SIN517 indicates that there is an attempt to create or import plant data for a plant 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: The error occurs because: The plant code you are trying to create or import is already present in the SAP system. There may be duplicate entries in the source data that you are trying to migrate. The migration process is attempting to create a new plant with an identifier that conflicts with an existing one.
Solution: To resolve this error, you can take the following steps: Check Existing Plants: Verify if the plant code you are trying to import already exists in the SAP system. You can do this by navigating to the relevant transaction (e.g., OX10 for plant maintenance) and checking the list of existing plants. Review Source Data: Inspect the source
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