GL-AR750 asked for a new admin password?

My GL-AR750S prompted me today to choose a new default language for the system and a new admin password. Is it normal that the password expires ?
(I’m not even sure I had to put my previous admin password before it asked me to change the password)

The wifi and every settings were the same after I changed the password.

Edit: It seems like I went through the first time setup process. Except i didn’t initiate it

Did you do something and make the router lost the old password settings?

If it cannot find the old password it will ask for new password

The only thing that happened was my mullvad subscription ended so I lost internet. I don’t know why it lost the other password tho in the first place.