Verify that the service has been assigned to this barber. You may need to assign the service to the barber first before attempting to modify or access it, then call the same operation again.
{ "type": "https://docs.guile.app/problems/serviceNotAssignedToBarber", "title": "Service Not Assigned to Barber", "status": 422, "detail": "The specified service exists but is not assigned to the specified barber."}
