On Tuesday 31 of December 2019 15:33:59 Michael wrote: > Get:18 > http://mirror.ppa.trinitydesktop.org/trinity/trinity-r14.0.0/debian > stretch InRelease [12.2 kB] > Get:19 > http://mirror.ppa.trinitydesktop.org/trinity/trinity-builddeps-r14.0.0/d >ebian stretch InRelease [12.0 kB] > Err:18 > http://mirror.ppa.trinitydesktop.org/trinity/trinity-r14.0.0/debian > stretch InRelease > The following signatures couldn't be verified because the public key > is not available: NO_PUBKEY C93AF1698685AD8B > Err:19 > http://mirror.ppa.trinitydesktop.org/trinity/trinity-builddeps-r14.0.0/d >ebian stretch InRelease > The following signatures couldn't be verified because the public key > is not available: NO_PUBKEY C93AF1698685AD8B > ... > E: The > repository > 'http://mirror.ppa.trinitydesktop.org/trinity/trinity-builddeps-r14.0.0/ >debian stretch InRelease' is no longer signed. > Hi Michael, you obviously don't have the trinity-keyring package installed and that's why you felt the change of the signing key. See: https://wiki.trinitydesktop.org/Release_Notes_For_R14.0.7#New_GPG_signing_key_for_deb_repositories https://wiki.trinitydesktop.org/DebianInstall#Import_GPG_signing_key Cheers -- Sl�vek