Install Updates could not fetch the package cache information lists - NO_PUBKEY

[Pradeepa Ranasinghe]

Get:1 http://repo.mysql.com/apt/ubuntu jammy InRelease [20.3 kB]
Hit:2 http://packages.microsoft.com/repos/code stable InRelease
Err:1 http://repo.mysql.com/apt/ubuntu jammy InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 467B942D3A79BD29
Hit:3 http://repo.linuxliteos.com/linuxlite fluorite InRelease
Hit:4 http://archive.canonical.com/ubuntu jammy InRelease
Hit:5 https://dl.google.com/linux/chrome/deb stable InRelease
Hit:6 http://archive.ubuntu.com/ubuntu jammy InRelease
Hit:7 https://packages.microsoft.com/ubuntu/18...erver-2019 bionic InRelease
Hit:8 http://archive.ubuntu.com/ubuntu jammy-updates InRelease
Hit:9 https://packages.microsoft.com/ubuntu/20...erver-2022 focal InRelease
Hit:10 http://archive.ubuntu.com/ubuntu jammy-backports InRelease
Hit:11 https://packages.microsoft.com/ubuntu/20.04/prod focal InRelease
Hit:12 http://archive.ubuntu.com/ubuntu jammy-security InRelease
Reading package lists...
W: GPG error: http://repo.mysql.com/apt/ubuntu jammy InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 467B942D3A79BD29
E: The repository 'http://repo.mysql.com/apt/ubuntu jammy InRelease' is not signed.

[stevef]

Open a terminal by pressing Ctrl, Alt and T together.
Copy or paste this command into the terminal session

Code:

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 467B942D3A79BD29

Enter your password when asked, then retry the update process.

[Pradeepa Ranasinghe]

apt --fix-broken install
does not execute. Ask for root password. do not continue

[stevef]

Please post your error logs if you are having problems with updates.