GPG keys expired for the debian install?

[KnowZero]

I am using Linux Mint 19.2, I followed the instructions for the debian install at the bottom of this page:

http://perl11.org/cperl/STATUS.html

deb http://perl11.org/deb/ sid main
run as root:

apt update
wget http://perl11.org/deb/rurban.gpg.key
apt-key add rurban.gpg.key
apt install cperl

And after installing the key and doing an apt update I got this error:

Get:3 http://perl11.org/deb sid Release [5,104 B]                              
Ign:8 http://perl11.org/deb sid Release.gpg  

....

E: The repository 'http://perl11.org/deb sid 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.

Looking at the apt-key list:

pub   dsa1024 2005-05-27 [SC] [expired: 2008-02-25]

uid           [ expired] Reini Urban <rurban@x-ray.at>

They expired back in 2008?

Edit: On closer look I do see newer GPG keys:

pub dsa1024 2008-03-22 [SC] [expires: 2020-01-08]

But no matter what I do it still says:

Get:3 http://perl11.org/deb sid Release [5,104 B]                              
Ign:8 http://perl11.org/deb sid Release.gpg  

....

E: The repository 'http://perl11.org/deb sid 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.

I even tried deleting the old gpg key in case of a conflict but it didn't help

[rurban]

Oops, I'll check. The 2020 key should be fine, but my go tool to create the debs started to have problem signing.