Updating heavily modded system fails 404 Not found

[minesheep]

I have installed Linux Lite 6.0 to 64gb usb flash drive (full installation). When I did a release upgrade with sudo do-release-upgrade it updated to Lunar Lobster (ubuntu 23.04?) And now when I run the same command again it errors. When I run sudo apt update I got

Code:

sudo apt update
[sudo] password for eero:
Ign:1 http://archive.canonical.com lunar InRelease                             
Err:2 http://archive.canonical.com lunar Release                               
  404  Not Found [IP: 185.125.188.12 80]
Hit:3 http://archive.ubuntu.com/ubuntu lunar InRelease                         
Hit:4 http://archive.ubuntu.com/ubuntu lunar-security InRelease               
Hit:5 http://repo.linuxliteos.com/linuxlite fluorite InRelease
Hit:6 http://archive.ubuntu.com/ubuntu lunar-updates InRelease
Hit:7 http://archive.ubuntu.com/ubuntu lunar-backports InRelease
Reading package lists... Done
E: The repository 'http://archive.canonical.com lunar Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

I have waited a week so it probably isn't a random outage at ubuntu update server. And I don't know how to fix it.

Edit: I have changed the file in /etc/update-manager/release-upgrades from lts to normal

[trinidad]

Linux Lite is LTS and can only be updated within a series (22.04 LTS) unless you want to do a whole lot of coding yourself. 23.xx is a short support release which will reach EOL when 24.xx appears and is a bad choice for continual use and not compatible with current Linux Lite. Linux Lite does not build RCs for Ubuntu's short term releases. I'm not sure if you can even regress your installation by restoring your original repo source list at this point and removing the 23.xx ones but you could start there.

TC

[minesheep]

After disabling that

Code:

http://archive.canonical.com lunar Release

with Software and updates both apt and do-release-update worked fine. Now on ubuntu 23.10 and its working fine. Yes I know this is not something an unexperienced user should do, but I have used Linux Lite for years and can do so basic Ubuntu work too.