Ошибка при обновлении с 20.04 на 21.04

Во время настройки я получаю следующее. Wi-Fi работает нормально.

W:Updating from such a repository can't be done securely, and is therefore disabled by default.  
W:See apt-secure(8) manpage for repository creation and user configuration details.  
E:The repository 'http://security.ubuntu.com/ubuntu eoan-security Release' does not have a Release file.