What causes this issue?

The partprovider &V2& has mapped at least one non-cumulative keyfigure
to the multiprovider or composite provider, but the non-cumulative time
reference characteristic &V1& is not yet mapped.

System Response

The check of the multiprovider/ composite provider fails

How to fix this error?

Map the time characteristic &V1& of the partprovider &V2& to the time
characteristic &V1& of the multiprovider/composite provider.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.