我想将我的 php 版本从 8 降级到 7.4，所以我添加了 php repo，sudo add-apt-repository ppa:ondrej/php
但是当我运行时， sudo apt update我收到 Insomnia repo 的错误
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.
我感谢任何人都可以帮助我，因为我还是 Linux 新手