I just sent my refurbished drone into DJI for repairs which the gimbal module is bad and it is being fixed for free. But I sent it the remote control as I didn’t know where the problem was but the serial comes back as CRASH201709180 which I didn’t know because the scan code and I assume the serial number is looks as though it was rubbed off. Has anyone heard of a serial number like this and why the crash in front of the numbers