Can't Update...

[flipperpull]

Hi, I am new to Linux. I am trying. I tried to update this laptop after a few months and got this error that sent me here.

Here is my log. Please advise. Thanks!:

===========================
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://repo.linuxliteos.com/linuxlite diamond InRelease
Hit:2 http://us.archive.ubuntu.com/ubuntu bionic InRelease
Hit:3 http://archive.canonical.com/ubuntu bionic InRelease
Hit:5 http://us.archive.ubuntu.com/ubuntu bionic-security InRelease
Hit:6 http://us.archive.ubuntu.com/ubuntu bionic-updates InRelease
Hit:7 http://us.archive.ubuntu.com/ubuntu bionic-backports InRelease
Hit:8 http://ppa.launchpad.net/teejee2008/ppa/ubuntu bionic InRelease
Get:4 http://ppa.launchpad.net/otto-kesselgulasch/gimp/ubuntu bionic InRelease [15.4 kB]
Reading package lists...
E: Repository 'http://ppa.launchpad.net/otto-kesselgulasch/gimp/ubuntu bionic InRelease' changed its 'Label' value from 'gimp' to 'gimp stable'