i nead help to update ubuntu do to mistake i did by uninstalling program app, this is what i get in terminal
[sudo] password for bjarnirt:
Ign:1 cdrom://Ubuntu 20.04 LTS _Focal Fossa_ - Release amd64 (20200423) focal InRelease
Err:2 cdrom://Ubuntu 20.04 LTS _Focal Fossa_ - Release amd64 (20200423) focal Release
Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
Hit:8 http://archive.ubuntu.com/ubuntu jammy InRelease
kB]
Get:12 http://archive.ubuntu.com/ubuntu noble-updates/multiverse amd64 DEP-11 Metadata [940 B]
Get:13 http://archive.ubuntu.com/ubuntu noble-backports/main amd64 DEP-11 Metadata [208 B]
Get:14 http://archive.ubuntu.com/ubuntu noble-backports/restricted amd64 DEP-11 Metadata [212 B]
Get:15 http://archive.ubuntu.com/ubuntu noble-backports/multiverse amd64 DEP-11 Metadata [212 B]
Get:16 http://archive.ubuntu.com/ubuntu noble-backports/universe amd64 DEP-11 Metadata [21,0 kB]
Reading package lists... Done
E: The repository 'cdrom://Ubuntu 20.04 LTS Focal Fossa - Release amd64 (20200423) focal 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.
bjarnirt@bjarnirt-Lenovo-IdeaPad-S145-14IWL:~$
