Release is Not signed

[exelsis]

root@localhost:/19# sudo apt-get update
Ign:1 http://old.kali.org/kali 2019.2 InRelease
Hit:2 http://old.kali.org/kali 2019.2 Release
Ign:3 http://old.kali.org/kali 2019.2 Release.gpg
Reading package lists... Done
E: The repository 'http://old.kali.org/kali 2019.2 Release' 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.
root@localhost:/19#

[stmlscd]

I also have the same error, so the update and upgrade are not done correctly.

And I want to solve this problem because kali is not running.

Please tell me how to solve it.

For reference, I provide this symptom screen.

[Ff2276]

root@localhost:/19# sudo apt-get update
Err:1 http://old.kali.org/kali 2019.2 InRelease
Connection failed [IP: 54.39.49.227 80]
Reading package lists... Done
W: Failed to fetch http://old.kali.org/kali/dists/2019.2/InRelease Connection failed [IP: 54.39.49.227 80]
W: Some index files failed to download. They have been ignored, or old ones used instead.
root@loc