Как решить эту проблему с репозиторием «... нет файла Release»?

      repository does not have release files  sudo apt-get update
Ign:1 https://download.rethinkdb.com/repository/ubuntu-impish impish InRelease
Err:2 https://download.rethinkdb.com/repository/ubuntu-impish impish Release
  404  Repository not found [IP: 167.172.11.96 443]
Reading package lists... Done
E: The repository 'https://download.rethinkdb.com/repository/ubuntu-impish impish 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.

помогите мне здесь