Не удается обновить Ubuntu20.04 LTS [дубликат]

Когда я запускаю sudo apt update , я получаю следующую ошибку:

Hit:1 http://in.archive.ubuntu.com/ubuntu focal InRelease
Hit:2 http://in.archive.ubuntu.com/ubuntu focal-updates InRelease               
Hit:3 http://in.archive.ubuntu.com/ubuntu focal-backports InRelease             
Hit:4 http://dl.google.com/linux/chrome/deb stable InRelease                       
Hit:5 http://in.archive.ubuntu.com/ubuntu focal-security InRelease                 
Hit:6 http://in.archive.ubuntu.com/ubuntu focal-proposed InRelease                 
Hit:7 http://ppa.launchpad.net/kivy-team/kivy-daily/ubuntu focal InRelease         
Hit:8 http://ppa.launchpad.net/kivy-team/kivy/ubuntu focal InRelease
Ign:9 http://ppa.launchpad.net/webupd8team/java/ubuntu focal InRelease
Err:10 http://ppa.launchpad.net/webupd8team/java/ubuntu focal Release
  404  Not Found [IP: 2001:67c:1560:8008::15 80]
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/webupd8team/java/ubuntu focal 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.

Как это исправить и обновить !!!