I want to downgrade my php version from 8 to 7.4
so I add php repo sudo add-apt-repository ppa:ondrej/php
but when I run sudo apt update
I got error from Insomnia repo
Err:16 https://dl.bintray.com/getinsomnia/Insomnia InRelease
403 Forbidden [IP: 52.35.132.179 443]
Reading package lists... Done
E: Failed to fetch https://dl.bintray.com/getinsomnia/Insomnia/InRelease 403 Forbidden [IP: 52.35.132.179 443]
E: The repository 'https://dl.bintray.com/getinsomnia/Insomnia InRelease' is no longer 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 thanks for anyone can help me, because I am still newbie in linux