Admin lockedout after update

Nextcloud version ( 20.0.7):

Is this the first time you’ve seen this error? (Y/N): N

Did the last update available and since the my admin user is logged out and can not reset the password.

I did search and saw a few similar subjects and solutions to reset the passsord. I am not a thech so did not try those solution because I don not 100% understand the process. I did find the help about the OCC command and $ sudo -u www-data php /var/www/nextcloud/occ user:resetpassword admin, which I do not understand. I do not run the server i’m just hosted, so I can not run commands

As mentionned above this has happened before. Usually 1 or 2 updates later I regain access to the admin account. So here is the question…: What can I do to stop loosing the admin access next time ? And as a bonus question if you know how to regain access in the mean time it would be appreciated.