SSH usage

How do you remove root access to SSH after an install and before you do your online update?

Edit /etc/sshd/sshd_config, find PermitRootLogin yes and change it to PermitRootLogin no, then systemctl restart sshd.

See here:
https://en.opensuse.org/SDB:Configure_openSSH#Limit_by_Users

But what does this have to do with online updates?

Online update from what to what?