GPG Expired... Again

[CCSnell]

Issued command:

curl -sL gpg.l9o.dev | sudo apt-key del -
and
echo "deb https://ppa.l9o.dev/raspbian ./" | sudo tee /etc/apt/sources.list.d/l9o.list

followed by:

sudo apt update

which returns:

W: GPG error: https://ppa.l9o.dev/raspbian ./ InRelease: The following signatures were invalid: EXPKEYSIG BF6F8043AC280E02 Luiz Ribeiro <luizribeiro@gmail.com>
E: The repository 'https://ppa.l9o.dev/raspbian ./ InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.

followed by:

sudo apt-key list

which returns:

pub   rsa4096 2019-11-23 [C] [expired: 2022-07-14]
      97A0 AE5E 03F3 499B 7D7A  65C6 76A4 1432 37EF 5817
uid           [ expired] Luiz Ribeiro <luizribeiro@gmail.com>

See expiration date above.