In an attempt to install Kali Linux tools on my Debian 11, I believe I did something wrong and I can no longer use the sudo apt update or upgrade commands. It gives NO PUB KEY errors and so on. Checking my device version with the lsb_release -a command
I noticed that the initial operating system (Debian 11) was not there, but Kali Linux.
No cat /etc/debian_version
It’s kali-rolling.

Can anyone help me solve this problem and recover my notebook without necessarily having to format it?

Yasmim@keep-os:~$ lsb_release -a
No LSB module is available.
Distributor ID: Kali
Description: Kali GNU/Linux Rolling
Release: 2024.2
Codename: Kali-rolling
Yasmim@keep-os:~$ cat /etc/debian_version
rolling kali
Yasmim@keep-os:~$

I expected to have installed just the tools, not that