oot@DietPi:~# apt update
Hit:2 Index of /debian buster InRelease
Hit:3 Index of /debian buster-updates InRelease
Ign:1 Index of /apt/ buster InRelease
Hit:5 Index of /debian-security buster/updates InRelease
Err:4 Index of /apt/ buster Release
404 Not Found [IP: 18.104.22.168 80]
Hit:6 Index of /debian buster-backports InRelease
Reading package lists… Done
E: The repository ‘http://apt.armbian.com buster Release’ no longer has a Release file.
N: Updating from such a repository can’t be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
root@DietPi:~# apt upgrade
E: dpkg was interrupted, you must manually run ‘dpkg --configure -a’ to correct the problem.