Once the role is transported from DEV to PRO you just need to sync the roles in PRO system and the new role will be available to select in an Access request, you do not need to import the role again.
there is a field called "Exist" in each role with a value for each connector, you will see this field with value=No until you run the job for role sync.
The dev connector should not be configured in the PROV scenario.
Regards,
Leon