Upgrade to Bullseye

The following happened in the early morning today (before I tried manual upgrade):
This is from /var/log/unattended-upgrades/unattended-upgrades.log

2021-08-24 06:04:40,653 INFO Starting unattended upgrades script
2021-08-24 06:04:40,669 INFO Allowed origins are: origin=Debian,codename=bullseye,label=Debian, origin=Debian,
codename=bullseye,label=Debian-Security, origin=Debian,codename=bullseye-security,label=Debian-Security, o=Deb
ian Backports,a=bullseye-backports,l=Debian Backports
2021-08-24 06:04:40,673 INFO Initial blacklist: 
2021-08-24 06:04:40,676 INFO Initial whitelist (not strict): 
2021-08-24 06:05:28,615 INFO Packages that will be upgraded: tor tor-geoipdb
2021-08-24 06:05:28,618 INFO Writing dpkg log to /var/log/unattended-upgrades/unattended-upgrades-dpkg.log
2021-08-24 06:08:25,916 ERROR Lock file is already taken, exiting
2021-08-24 06:15:32,505 INFO All upgrades installed
2021-08-24 06:15:36,646 INFO Package freedombox is kept back because a related package is kept back or due to 
local apt_preferences(5).
2021-08-24 06:15:36,820 INFO Package guile-2.2-libs is kept back because a related package is kept back or due
 to local apt_preferences(5).
2021-08-24 06:15:38,645 INFO Package sshfs is kept back because a related package is kept back or due to local
 apt_preferences(5).

The “ERROR Lock file is already taken” appears only once in the log file, so this is new. I did not try anything new yesterday (besides looking into cockpit). Apparently, the tor package was upgraded.

I just tried the manual update in the web interface, the same packages are still upgradable, cockpit now says that freedombox-manual-upgrade.service failed to start.

I could try the command line update but I am a bit worried by the “Lock file is already taken”.