rkhunter warnings: SSH protocol v1 + SSH root access allowed, fix?

How can I solve the following rkhunter warnings?:

Checking if SSH root access is allowed                   [ Warning ]
Checking if SSH protocol v1 is allowed                   [ Warning ]

and what do they mean? Please, take into account that I'm a newbie with a fresh installation of openSUSE Leap 15.3 KDE.