Hi Albert, Gerald,
This is indeed good idea - in later code you can perform remote factory-reset through RF-Domain manager.
In case it is too difficult to get AP down from ceiling (connect with console) and you are not able to reach affected AP via adopting controller or RFDM, please raise a support case via Extreme Networks Case management portal.
I or one of my colleagues will assist you resetting that.
Regards,
Ondrej