无法更新 ubuntu 中的存储库 /

我想在 Ubuntu 上安装一些软件，但首先我想更新软件包，我收到了这个：

sudo apt-get update
Ign:1 http://ro.archive.ubuntu.com/ubuntu eoan InRelease
Ign:2 http://ro.archive.ubuntu.com/ubuntu eoan-updates InRelease                                       
Ign:3 http://ro.archive.ubuntu.com/ubuntu eoan-backports InRelease                                     
Hit:4 http://ppa.launchpad.net/ondrej/php/ubuntu eoan InRelease             
Err:5 http://ro.archive.ubuntu.com/ubuntu eoan Release                                         
  404  Not Found [IP: 91.209.189.249 80]
Err:6 http://ro.archive.ubuntu.com/ubuntu eoan-updates Release                                 
  404  Not Found [IP: 91.209.189.249 80]
Ign:7 http://security.ubuntu.com/ubuntu eoan-security InRelease                                
Hit:8 http://ppa.launchpad.net/phpmyadmin/ppa/ubuntu eoan InRelease                            
Err:9 http://ro.archive.ubuntu.com/ubuntu eoan-backports Release                               
  404  Not Found [IP: 91.209.189.249 80]
Err:10 http://security.ubuntu.com/ubuntu eoan-security Release
  404  Not Found [IP: 91.189.88.152 80]
Reading package lists... Done
E: The repository 'http://ro.archive.ubuntu.com/ubuntu eoan Release' no longer has 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.
E: The repository 'http://ro.archive.ubuntu.com/ubuntu eoan-updates Release' no longer has 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.
E: The repository 'http://ro.archive.ubuntu.com/ubuntu eoan-backports Release' no longer has 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.
E: The repository 'http://security.ubuntu.com/ubuntu eoan-security Release' no longer has 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

我不知道到底发生了什么，因为我以前从未遇到过问题。你能帮我完成这项工作吗？我有 Ubuntu 19 版本：

No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 19.10
Release:    19.10
Codename:   eoan