[Software] apt update not working

Code:

Hit:1 http://deb.debian.org/debian bookworm InReleaseHit:2 http://deb.debian.org/debian bookworm-updates InRelease                                                   Hit:3 http://deb.debian.org/debian-security bookworm-security InRelease                                                                          Hit:4 http://repository.spotify.com stable InRelease                                                                                             Hit:5 https://packages.microsoft.com/repos/code stable InRelease              Ign:6 https://apt.kitware.com/ubuntu bookworm InRelease Err:7 https://apt.kitware.com/ubuntu bookworm Release  404  Not Found [IP: 66.194.253.25 443]Reading package lists... DoneE: The repository 'https://apt.kitware.com/ubuntu bookworm 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.

Code:

# See sources.list(5) manpage for more information# Remember that CD-ROMs, DVDs and such are managed through the apt-cdrom tool.deb http://deb.debian.org/debian bookworm main contrib non-free non-free-firmwaredeb http://deb.debian.org/debian bookworm-updates main contrib non-free non-free-firmwaredeb http://deb.debian.org/debian-security bookworm-security main contrib non-free non-free-firmware# Uncomment if you want the apt-get source function to work#deb-src http://deb.debian.org/debian bookworm main contrib non-free#deb-src http://deb.debian.org/debian bookworm-updates main contrib non-free#deb-src http://deb.debian.org/debian-security bookworm-security main contrib non-free