apt-cacher-ng "The following signatures were invalid: BADSIG"

[davidshere]

I've been running apt-cacher-ng for a while now and I just recently started getting this message when doing an apt-get update on clients:

W: GPG error: http://thebone lucid-updates Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>

What can I do to clear this?

Because of this error it's saying that the packages can't be authenticated.

[davidshere]

Upon suggestion I have also tried the command sudo apt-get update -o Acquire::http::No-Cache=true
on the client and got similar results:

david@lucid-testing:~$  sudo apt-get update -o Acquire::http::No-Cache=true
Hit http://thebone lucid Release.gpg
Ign http://thebone/us.archive.ubuntu.com/ubuntu/ lucid/main Translation-en_US
Ign http://thebone/us.archive.ubuntu.com/ubuntu/ lucid/restricted Translation-en_US
Ign http://thebone/us.archive.ubuntu.com/ubuntu/ lucid/universe Translation-en_US
Ign http://thebone/us.archive.ubuntu.com/ubuntu/ lucid/multiverse Translation-en_US
Get:1 http://thebone lucid-updates Release.gpg [189B]
Ign http://thebone/us.archive.ubuntu.com/ubuntu/ lucid-updates/main Translation-en_US
Ign http://thebone/us.archive.ubuntu.com/ubuntu/ lucid-updates/restricted Translation-en_US
Ign http://thebone/us.archive.ubuntu.com/ubuntu/ lucid-updates/universe Translation-en_US
Ign http://thebone/us.archive.ubuntu.com/ubuntu/ lucid-updates/multiverse Translation-en_US
Hit http://thebone lucid-backports Release.gpg
Ign http://thebone/us.archive.ubuntu.com/ubuntu/ lucid-backports/main Translation-en_US
Ign http://thebone/us.archive.ubuntu.com/ubuntu/ lucid-backports/restricted Translation-en_US
Ign http://thebone/us.archive.ubuntu.com/ubuntu/ lucid-backports/universe Translation-en_US
Ign http://thebone/us.archive.ubuntu.com/ubuntu/ lucid-backports/multiverse Translation-en_US
Hit http://thebone lucid Release.gpg
Ign http://thebone/archive.canonical.com/ubuntu/ lucid/partner Translation-en_US
Hit http://thebone lucid-security Release.gpg
Ign http://thebone/security.ubuntu.com/ubuntu/ lucid-security/main Translation-en_US
Ign http://thebone/security.ubuntu.com/ubuntu/ lucid-security/restricted Translation-en_US
Ign http://thebone/security.ubuntu.com/ubuntu/ lucid-security/universe Translation-en_US
Ign http://thebone/security.ubuntu.com/ubuntu/ lucid-security/multiverse Translation-en_US
Hit http://thebone lucid Release
Get:2 http://thebone lucid-updates Release [38.5kB]
Ign http://thebone lucid-updates Release
Hit http://thebone lucid-backports Release
Hit http://thebone lucid Release
Hit http://thebone lucid-security Release
Hit http://thebone lucid/main Packages
Hit http://thebone lucid/restricted Packages
Hit http://thebone lucid/main Sources
Hit http://thebone lucid/restricted Sources
Hit http://thebone lucid/universe Packages
Hit http://thebone lucid/universe Sources
Hit http://thebone lucid/multiverse Packages
Hit http://thebone lucid/multiverse Sources
Hit http://thebone lucid-updates/main Packages
Hit http://thebone lucid-updates/restricted Packages
Hit http://thebone lucid-updates/main Sources
Hit http://thebone lucid-updates/restricted Sources
Hit http://thebone lucid-updates/universe Packages
Hit http://thebone lucid-updates/universe Sources
Hit http://thebone lucid-updates/multiverse Packages
Hit http://thebone lucid-updates/multiverse Sources
Hit http://thebone lucid-backports/main Packages
Hit http://thebone lucid-backports/restricted Packages
Hit http://thebone lucid-backports/universe Packages
Hit http://thebone lucid-backports/multiverse Packages
Hit http://thebone lucid-backports/main Sources
Hit http://thebone lucid-backports/restricted Sources
Hit http://thebone lucid-backports/universe Sources
Hit http://thebone lucid-backports/multiverse Sources
Hit http://thebone lucid/partner Packages
Hit http://thebone lucid/partner Sources
Hit http://thebone lucid-security/main Packages
Hit http://thebone lucid-security/restricted Packages
Hit http://thebone lucid-security/main Sources
Hit http://thebone lucid-security/restricted Sources
Hit http://thebone lucid-security/universe Packages
Hit http://thebone lucid-security/universe Sources
Hit http://thebone lucid-security/multiverse Packages
Hit http://thebone lucid-security/multiverse Sources
Fetched 190B in 19s (10B/s)
Reading package lists... Done
W: GPG error: http://thebone lucid-updates Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>
david@lucid-testing:~$

[davidshere]

bump

[apalacheno]

Yeah, that would interest me as well!

[tajiknomi]

Try these commands:-

apt-get clean
cd /var/lib/apt
mv lists lists.old
mkdir -p lists/partial
apt-get clean
apt-get update

[WildTangent]

Neither method fixed the problem. Any other ideas besides purging the entire cache?