My sources list is messed up please help me out

Hi, my sources list is messed up right now…
Like this:

I get this right now, how do i fix it? I’m not good i linux…

Preformatted text"sudo apt-get update && sudo apt-get upgrade -y
Hit:1 hpureos byzantium InRelease
Get:2 h
rg bullseye InRelease [39,6 kB]
Hit:3 htt/pureos byzantium-security InRelease
Err:2 h
g bullseye InRelease
The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY CB8D50BB77BB3C48
Hit:4 hom stable InRelease
Hit:5 h
t/pureos byzantium-updates InRelease
Reading package lists… Done
W: GPG error: h*g bullseye InRelease: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY CB8D50BB77BB3C48
E: The repository ‘https://deb.whonix.org bullseye InRelease’ is not signed.
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.
"

Thanks

p.s: I had to remove the links because new users can only post 2 url’s on here