I bought a pre-owned P3A. It powers on and everything looks fine when connecting to DJI Go app. I can see the live camera view and able to start the drone without the props on. I can see the app recording this flight in flight log but it has the drone's name set by previous owner. The app does not prompt me to enter a name for the drone so I can change it to a new name. How do I go about doing this and registering it? Thanks