Message type: E = Error
Message class:  CNV_DMC_SIN - Messages for s-innovations migration 
Message number: 568
Message text: Either key field &1 or &2 or &3 on sheet/table &4 is mandatory
Either key field &V1& or &V2& or &V3& on sheet/table &V4& is mandatory.
It is not allowed to keep these fields empty or provide for all a
value ot same time.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Only one of these fields must be filled.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV_DMC_SIN568 indicates that during a data migration or conversion process, one or more mandatory key fields are missing in the specified sheet or table. This error typically arises in the context of using the SAP Data Migration Cockpit or similar tools where data is being imported into the SAP system.
Cause: The error occurs when: The data being imported does not contain values for one or more of the required key fields (indicated as &1, &2, &3) in the specified sheet or table (indicated as &4). The key fields are essential for uniquely identifying records in the target system, and their absence prevents the successful import of data.
Solution: To resolve this error, you can take the following steps: Identify the Key Fields: Check the documentation or the data migration template to identify which fields are mandatory. The error message will specify which fields are missing. Review the Data Source: Go back to the
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