[Solved] apt update not working

[user9230254938]

Hello,
I am new to Debian I am not sure how to fix my current issue. When I run sudo apt update I get the following output

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Hit:1 http://deb.debian.org/debian bookworm InRelease
Hit: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... Done
E: 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.

Here is my sources.list:

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# 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-firmware
deb http://deb.debian.org/debian bookworm-updates main contrib non-free non-free-firmware
deb 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

I'm not sure what I should do, I tried the sources.list file from the Debian website too, getting the same problem.
Thanks

[FreewheelinFrank]

The offending entry is in

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/etc/apt/sources.list.d

[user9230254938]

This is what is in that directory
archive_uri-https_apt_kitware_com_ubuntu_-bookworm.list:

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deb https://apt.kitware.com/ubuntu/ bookworm main
# deb-src https://apt.kitware.com/ubuntu/ bookworm main

vscode.list:

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### THIS FILE IS AUTOMATICALLY CONFIGURED ###
# You may comment out this entry, but any other modifications may be lost.
deb [arch=amd64,arm64,armhf] https://packages.microsoft.com/repos/code stable main

[FreewheelinFrank]

This is what is in that directory
archive_uri-https_apt_kitware_com_ubuntu_-bookworm.list:

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deb https://apt.kitware.com/ubuntu/ bookworm main
# deb-src https://apt.kitware.com/ubuntu/ bookworm main

There is no bookworm suite in that repository. It's for Ubuntu, and available suites reflect Ubuntu versions.

What were you trying to install from there and do Kitware make any claim that it's compatible with Debian?

[user9230254938]

Oh right, I forgot what it was, it was probably from some guide to install something and I didn't realise the incompatibility.
It works now without this file.
Thanks!

[PsychoHermit]

You shouldn't use foreign repositories, eventually you will break Debian.

--glenn