I've already looked at few answers on unattended-upgrades topic but none of them seem to help.
When there is pending reboot and I am logged in to the server I keep getting these notifications to my session:
Broadcast message from root@server (Thu 2020-10-15 20:00:00 UTC): The system is going down for reboot at Fri 2020-10-16 00:00:00 UTC!
I know I can disable future runs of apt-upgrade to not reboot by setting Unattended-Upgrade::Automatic-Reboot "false"; in /etc/apt/apt.conf.d/50unattended-upgrades
But I need the cancel the current reboot. How can I cancel just the above scheduled reboot?