update error after separate app store download - how do i remove uninstalled app

[bionicle_159]

===========================
Install Updates Error log
===========================
Install Updates could not fetch the package cache information lists.
Go to https://www.linuxliteos.com/forums/ and paste the log below into a new or existing thread for assistance.

============ Log ===========

Hit:1 http://archive.ubuntu.com/ubuntu bionic InRelease
Hit:2 http://repository.spotify.com stable InRelease
Get:3 http://archive.ubuntu.com/ubuntu bionic-security InRelease [83.2 kB]
Hit:4 http://archive.canonical.com bionic InRelease
Hit:5 http://repo.linuxliteos.com/linuxlite diamond InRelease
Ign:6 http://ppa.launchpad.net/noobslab/deepin-sc/ubuntu bionic InRelease
Hit:7 http://ppa.launchpad.net/otto-kesselgulasch/gimp/ubuntu bionic InRelease
Hit:8 http://ppa.launchpad.net/teejee2008/ppa/ubuntu bionic InRelease
Hit:9 http://ppa.launchpad.net/yannubuntu/boot-repair/ubuntu bionic InRelease
Hit:10 http://repo.steampowered.com/steam precise InRelease
Err:11 http://ppa.launchpad.net/noobslab/deepin-sc/ubuntu bionic Release
  404  Not Found [IP: 91.189.95.83 80]
Get:12 http://archive.ubuntu.com/ubuntu bionic-updates InRelease [88.7 kB]
Get:13 http://archive.ubuntu.com/ubuntu bionic-backports InRelease [74.6 kB]
Reading package lists...
E: The repository 'http://ppa.launchpad.net/noobslab/deepin-sc/ubuntu bionic Release' does not have a Release file.

[Valtam]

Remove the Deepin PPA, not compatible. See - https://www.linuxliteos.com/manual/software.html#ppa

[bionicle_159]

thanks that did the trick, is there a way to lock the desktop icons. also could you guys try to allow support for different app centres as some expansion cards i have would benefit from a tool that other distros have.

cheers