Still trying to upgrade a system that was installed 6.0 and upgraded to 6.2.x with no problems. I cloned the system and have attempted to upgrade to 7. After a bit I reboot and get stuff like this in the logs.
Apr 1 15:32:10 mx1 systemd[1]: Reloading.
Apr 1 15:32:10 mx1 systemd[1]: /lib/systemd/system/dbus.socket:5: ListenStream= references a path below legacy directory /var/run/, updating /var/run/dbus/system_bus_socket → /run/dbus/system_bus_socket; please update the unit file accordingly.
Apr 1 15:32:10 mx1 systemd[1]: named.service: Wants dependency dropin /etc/systemd/system/named.service.wants/fix-744304.conf is not a symlink, ignoring.
Apr 1 15:32:10 mx1 systemd[1]: /lib/systemd/system/dovecot.service:19: PIDFile= references a path below legacy directory /var/run/, updating /var/run/dovecot/master.pid → /run/dovecot/master.pid; please update the unit file accordingly.
Apr 1 15:32:20 mx1 systemd[1]: Reloading.
Apr 1 15:32:20 mx1 systemd[1]: /lib/systemd/system/dbus.socket:5: ListenStream= references a path below legacy directory /var/run/, updating /var/run/dbus/system_bus_socket → /run/dbus/system_bus_socket; please update the unit file accordingly.
Apr 1 15:32:20 mx1 systemd[1]: named.service: Wants dependency dropin /etc/systemd/system/named.service.wants/fix-744304.conf is not a symlink, ignoring.
Apr 1 15:32:20 mx1 systemd[1]: /lib/systemd/system/dovecot.service:19: PIDFile= references a path below legacy directory /var/run/, updating /var/run/dovecot/master.pid → /run/dovecot/master.pid; please update the unit file accordingly.