Upgrade Error

[PlaGames]

Ign:1 cdrom://Linux Lite 5.8 - Release amd64 dists/ InRelease
Ign:2 cdrom://Linux 20.04 - Release amd64 dists/ InRelease
Err:3 cdrom://Linux Lite 5.8 - Release amd64 dists/ Release
  Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
Err:4 cdrom://Linux 20.04 - Release amd64 dists/ 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:5 http://archive.ubuntu.com/ubuntu focal InRelease
Hit:6 http://archive.canonical.com/ubuntu focal InRelease
Get:7 http://archive.ubuntu.com/ubuntu focal-backports InRelease [108 kB]
Hit:8 http://repo.linuxliteos.com/linuxlite emerald InRelease
Get:9 http://archive.ubuntu.com/ubuntu focal-security InRelease [114 kB]
Get:10 http://archive.ubuntu.com/ubuntu focal-updates InRelease [114 kB]
Reading package lists...
E: The repository 'cdrom://Linux Lite 5.8 - Release amd64 dists/ Release' does not have a Release file.
E: The repository 'cdrom://Linux 20.04 - Release amd64 dists/ Release' does not have a Release file.

anyone can help