So today I upgraded to the latest alpha to try out the fingerprint + PIN unlock, and I set a nice, strong password as my main protection. It's a 7-word Diceware password, and foolishly I have forgotten one of the words.
At the moment, I can still get into my owner profile through fingerprint and PIN.
I don't suppose there's anything I can do other than either remember the password, or backup everything I need and do a factory reset?