Anonymous
public text v1 · immutableerror: GPG validation failed!
The update downloaded successfully, but it was not signed with a trusted GPG
key. Instead, it was signed with the following keys:
856AA88A
Perhaps you need to import the channel's GPG key? For example:
wget http://spamassassin.apache.org/updates/GPG.KEY
gpg --import GPG.KEY
channel: GPG validation failed, channel failed