Whenever I run sudo apt-get update
I get the errors and warnings below:
(updated after trying Norbert's solution)
Reading package lists... Done
W: Target Packages (non-free/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list:51 and /etc/apt/sources.list:54
W: Target Packages (non-free/binary-i386/Packages) is configured multiple times in /etc/apt/sources.list:51 and /etc/apt/sources.list:54
W: Target Packages (non-free/binary-all/Packages) is configured multiple times in /etc/apt/sources.list:51 and /etc/apt/sources.list:54
W: Target Translations (non-free/i18n/Translation-en_IN) is configured multiple times in /etc/apt/sources.list:51 and /etc/apt/sources.list:54
W: Target Translations (non-free/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list:51 and /etc/apt/sources.list:54
W: Target DEP-11 (non-free/dep11/Components-amd64.yml) is configured multiple times in /etc/apt/sources.list:51 and /etc/apt/sources.list:54
W: Target DEP-11-icons (non-free/dep11/icons-64x64.tar) is configured multiple times in /etc/apt/sources.list:51 and /etc/apt/sources.list:54
W: Target Packages (non-free/binary-amd64/Packages) is configured multiple times in /etc/apt/sources.list:51 and /etc/apt/sources.list:54
W: Target Packages (non-free/binary-i386/Packages) is configured multiple times in /etc/apt/sources.list:51 and /etc/apt/sources.list:54
W: Target Packages (non-free/binary-all/Packages) is configured multiple times in /etc/apt/sources.list:51 and /etc/apt/sources.list:54
W: Target Translations (non-free/i18n/Translation-en_IN) is configured multiple times in /etc/apt/sources.list:51 and /etc/apt/sources.list:54
W: Target Translations (non-free/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list:51 and /etc/apt/sources.list:54
W: Target DEP-11 (non-free/dep11/Components-amd64.yml) is configured multiple times in /etc/apt/sources.list:51 and /etc/apt/sources.list:54
W: Target DEP-11-icons (non-free/dep11/icons-64x64.tar) is configured multiple times in /etc/apt/sources.list:51 and /etc/apt/sources.list:54
This is my /etc/apt/sources.list (updated):