Update error log

[bgaulke]

I am having the same problem. Here is my error log.
===========================
Install Updates Error log
===========================
Install Updates could not fetch the package cache information lists.
Go to https://www.linuxliteos.com/forums/ and paste the log below into a new or existing thread for assistance.

============ Log ===========

Hit:1 http://archive.canonical.com/ubuntu bionic InRelease
Hit:2 http://us.archive.ubuntu.com/ubuntu bionic InRelease
Ign:3 http://dl.google.com/linux/chrome/deb stable InRelease
Ign:4 http://archive.canonical.com precise InRelease
Get:5 http://us.archive.ubuntu.com/ubuntu bionic-security InRelease [88.7 kB]
Get:6 http://archive.canonical.com precise Release [8,180 B]
Hit:7 http://ppa.launchpad.net/otto-kesselgulasch/gimp/ubuntu bionic InRelease
Get:8 http://archive.canonical.com precise Release.gpg [181 B]
Hit:9 http://dl.google.com/linux/chrome/deb stable Release
Hit:10 https://repo.skype.com/deb stable InRelease
Get:11 http://us.archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]
Ign:8 http://archive.canonical.com precise Release.gpg
Hit:12 http://ppa.launchpad.net/teejee2008/ppa/ubuntu bionic InRelease
Get:13 http://us.archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6 kB]
Hit:15 http://repo.linuxliteos.com/linuxlite diamond InRelease
Reading package lists...
W: GPG error: http://archive.canonical.com precise Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5
E: The repository 'http://archive.canonical.com precise Release' is not signed.