I just want to duplicate my setup on another RPi3 (bluetooth question)

[Patrick2209]

Greetings! This is probably a noob question, so I apologize... But I haven't been able to find anything that explains my situation.

I, with my limited skills, was able to set up my own retropie system on an RPi 3B. It took me a while, but I was able to get my two 8Bitdo SNES30 bluetooth controllers to work very well with my setup. I am setting up a system for a friend of mine with identical hardware except for the controllers. He wanted the SFC30 controllers... which are the same except for coloring. Anyway... I have figured out that I can't just clone my SD card, insert it in a new machine, and expect even my controllers to pair to that. My question is: How do I jus clear the bluetooth settings so I can set up with the new controllers on his system? I have tried everything that I did with my old system to get things working, but apparently I need to clear something out and start over. I can get the system to see the controllers both inside retropie and using bluetoothctl in the terminal. I just can't get it to pair. It attempts to and then gives me one of several errors. I have also encountered this when I tried to add an NES Pro controller to my current setup. I've added the UDEV command in like I did to get my first controllers working. Flashed the firmware to latest on controllers and also rolled it back and tried previous versions. It's probably something ridiculously simple. Any advice?

Thanks!