Install Updates - error log

[whateverthing]

Hi folks -- I'm still in LL 3.4, and have been having trouble getting through the Install Updates process. I've even tried these steps from another thread:

Code:

sudo apt-get clean
sudo apt autoremove -y
sudo apt-get update
sudo apt-get dist-upgrade

Here's my Install Updates error log:

===========================
Install Updates Error log
===========================
Install Updates could not fetch the package cache information lists.
Go to https://www.freecinema2022.gq/forums/ and paste the log below into a new or existing thread for assistance.

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

Hit:1 http://repo.linuxliteos.com/linuxlite citrine InRelease
Hit:2 http://repository.spotify.com stable InRelease
Hit:3 http://us.archive.ubuntu.com/ubuntu xenial InRelease
Ign:4 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial InRelease
Hit:5 http://ppa.launchpad.net/nemh/systemback/ubuntu xenial InRelease
Get:6 http://us.archive.ubuntu.com/ubuntu xenial-security InRelease [102 kB]
Hit:7 http://archive.canonical.com xenial InRelease
Hit:8 http://ppa.launchpad.net/otto-kesselgulasch/gimp/ubuntu xenial InRelease
Hit:9 http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu xenial InRelease
Ign:10 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial Release
Ign:11 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main amd64 Packages
Ign:12 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main i386 Packages
Ign:13 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main all Packages
Ign:14 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main Translation-en_US
Ign:15 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main Translation-en
Ign:11 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main amd64 Packages
Ign:12 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main i386 Packages
Ign:13 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main all Packages
Ign:14 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main Translation-en_US
Ign:15 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main Translation-en
Ign:11 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main amd64 Packages
Ign:12 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main i386 Packages
Ign:13 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main all Packages
Ign:14 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main Translation-en_US
Ign:15 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main Translation-en
Ign:11 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main amd64 Packages
Ign:12 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main i386 Packages
Ign:13 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main all Packages
Ign:14 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main Translation-en_US
Ign:15 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main Translation-en
Ign:11 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main amd64 Packages
Ign:12 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main i386 Packages
Ign:13 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main all Packages
Ign:14 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main Translation-en_US
Ign:15 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main Translation-en
Err:11 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main amd64 Packages
  404  Not Found
Ign:12 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main i386 Packages
Ign:13 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main all Packages
Ign:14 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main Translation-en_US
Ign:15 http://ppa.launchpad.net/aheck/ppa/ubuntu xenial/main Translation-en
Get:6 http://us.archive.ubuntu.com/ubuntu xenial-security InRelease [102 kB]
Get:16 http://us.archive.ubuntu.com/ubuntu xenial-updates InRelease [102 kB]
Hit:17 http://us.archive.ubuntu.com/ubuntu xenial-proposed InRelease
Get:18 http://us.archive.ubuntu.com/ubuntu xenial-backports InRelease [102 kB]
Fetched 208 kB in 2min 57s (1,174 B/s)
Reading package lists...
W: The repository 'http://ppa.launchpad.net/aheck/ppa/ubuntu xenial Release' does not have a Release file.
E: Failed to fetch http://ppa.launchpad.net/aheck/ppa/ubunt...4/Packages  404  Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.