All columns of a CDC unique index must be defined as NOT NULL. Index '%1!s!' selected as the CDC unique index for source ...

All columns of a CDC unique index must be defined as NOT NULL. Index '%1!s!' selected as the CDC unique index for source table '%2!s!.%3!s!' does not meet this requirement. Define all columns of the selected index as NOT NULL or select another unique index as the CDC index and resubmit the request.