phablet-tools repo not working

[Sumit Patil]

repo gives error 404

like this:
sudo apt-get update
Hit:1 https://download.docker.com/linux/ubuntu focal InRelease
Hit:2 https://download.docker.com/linux/ubuntu mantic InRelease
Hit:3 http://archive.canonical.com/ubuntu focal InRelease
Hit:4 https://ppa.launchpadcontent.net/i2p-maintainers/i2p/ubuntu noble InRelease
Ign:5 https://ppa.launchpadcontent.net/phablet-team/tools/ubuntu mantic InRelease
Hit:6 http://archive.ubuntu.com/ubuntu focal InRelease
Err:7 https://ppa.launchpadcontent.net/phablet-team/tools/ubuntu mantic Release
  404 Not Found [IP: 185.125.190.80 443]
Get:8 http://archive.ubuntu.com/ubuntu focal-updates InRelease [114 kB]
Hit:9 http://archive.ubuntu.com/ubuntu focal-security InRelease
Hit:10 http://archive.ubuntu.com/ubuntu focal-backports InRelease
Reading package lists... Done
W: https://download.docker.com/linux/ubuntu/dists/focal/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
W: https://ppa.launchpadcontent.net/i2p-maintainers/i2p/ubuntu/dists/noble/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
E: The repository 'https://ppa.launchpadcontent.net/phablet-team/tools/ubuntu mantic 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.