[SOLVED] The repository 'http://httpredir.debian.org/debian bullseye-backports Release' no longer has a Release file

[Admiral Awesome]

Hi,
every morning I'm greeted with an e-mail from my proxmox instance with this message:

CRON-APT RUN [/etc/cron-apt/config]: Fri Mar 27 07:39:52 CET 2026

CRON-APT SLEEP: 1122, Fri Mar 27 07:58:34 CET 2026

CRON-APT ACTION: 0-update

CRON-APT LINE: /usr/bin/apt-get  update -o quiet=2

E: The repository 'http://httpredir.debian.org/debian bullseye-backports Release' no longer has a Release file.

I've already checked my repository list - no bullseye anywhere I could find. Apt is also running update just fine:

~# grep -r bullseye-backports /etc/apt/

~# apt update

Hit:1 http://ftp.pl.debian.org/debian trixie InRelease

Hit:2 http://ftp.pl.debian.org/debian trixie-updates InRelease                                                                                   

Hit:3 http://security.debian.org trixie-security InRelease                                                                                       

Hit:4 https://deb.debian.org/debian trixie InRelease                                                             

Hit:5 http://download.proxmox.com/debian/pve trixie InRelease                               

86 packages can be upgraded. Run 'apt list --upgradable' to see them.

I'm running 9.1.6.
I'm out of ideas where to search for this missing piece from my configuration.

Thank you for reading.

 

[Impact]

I'd try this

grep --color -sRi "bullseye-backports" /etc/ /var/log/apt/ /var/lib/
cron-apt -s

Are you absolutely sure that the mail comes from the host you're running this on?
I use apticron myself.

 

[Admiral Awesome]

I'm positive I'm running this on my only host I've got.

 

[Impact]

Then share the output of the commands above.

 

[proxuser77]

[/etc/cron-apt/config]

Have you also checked that file? It seems like the message is coming from cron-apt, a tool to automate updates. Apparently, you can assign dedicated sources lists directly to cron-apt: https://wiki.ubuntuusers.de/cron-apt/#Spezielle-sources-list.

(Sorry, the second link is in German.)

 

[Admiral Awesome]

I'd try this

grep --color -sRi "bullseye-backports" /etc/ /var/log/apt/ /var/lib/
cron-apt -s

Are you absolutely sure that the mail comes from the host you're running this on?
I use apticron myself.

~# grep --color -sRi "bullseye-backports" /etc/ /var/log/apt/ /var/lib/
~# cron-apt -s
-bash: cron-apt: command not found

What is also interesting @proxuser77 :
Directory '/etc/cron-apt' does not exist

What kind of a loopy land have I entered?!

I'll also try to once again re-write e-mail rules, since I honestly can't find anything related to apt (that's me running out of ideas).

 

[Impact]

I'm positive I'm running this on my only host I've got.

I kinda doubt it. Might be from a guest. You stripped the hostname from your commands/prompt so I can't judge. The mail headers might have more information about the source.

 

[Johannes S]

What verdion of PVE are you running? Bullseye is quite outdated

 

[Admiral Awesome]

I kinda doubt it. Might be from a guest. You stripped the hostname from your commands/prompt so I can't judge. The mail headers might have more information about the source.

I've checked headers and you are 1000% RIGHT! Mail was sent from OMV, not my host. Completely forgot I had it configured long time ago!
Thank you very much - solved.

 

[Johannes S]

OMV should have a newer Version too. I would Update to the most recent stable Release as fast as possible since old Version won't get security Updates anymore at some point