Keepass installation yields error after sudo apt update

```
sudo apt update
Hit:1 http://security.ubuntu.com/ubuntu hirsute-security InRelease
Hit:2 https://updates.signal.org/desktop/apt xenial InRelease
Ign:3 http://ppa.launchpad.net/jtaylor/keepass/ubuntu hirsute InRelease
Hit:4 https://brave-browser-apt-release.s3.brave.com stable InRelease
Hit:5 http://nl.archive.ubuntu.com/ubuntu hirsute InRelease
Err:6 http://ppa.launchpad.net/jtaylor/keepass/ubuntu hirsute Release
404 Not Found [IP: 91.189.95.85 80]
Hit:7 http://nl.archive.ubuntu.com/ubuntu hirsute-updates InRelease
Hit:8 http://nl.archive.ubuntu.com/ubuntu hirsute-backports InRelease
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/jtaylor/keepass/ubuntu hirsute Release' does not have a Release file.
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.

```
Prevent this error from occurring.