Solo2 key not recognised anymore to log into an account

[Suitundo]

Hi,

For some reason one of my Solo2 USB-A key can't be used to log me into my accounts where I've set a security key.
"This security key doesn't look familiar. Please try a different one." is the message I'm getting.
I've updated the firmware to 2:20220822.0 thru the Rust instruction, so the key can be discovered, but that doesn't help.
Some user reports I came across thru Reddit talk about keys being bricked after trying NFC account unlocking on a mobile Phone, and I can remember trying it a few times without it working. Was that the cause I'm now no longer able to use my main key?

My backup key works, can add it to my accounts (and unlock the account with the key).

[Suitundo]