...
Ign:10 http://archive.canonical.com sarah/partner all Packages
Ign:11 http://archive.canonical.com sarah/partner Translation-en_GB
Ign:12 http://archive.canonical.com sarah/partner Translation-en
Reading package lists... Done
W: Target Packages (partner/binary-i386/Packages) is configured multiple times in /etc/apt/sources.list.d/additional-repositories.list:1 and /etc/apt/sources.list.d/additional-repositories.list:2
W: Target Packages (partner/binary-all/Packages) is configured multiple times in /etc/apt/sources.list.d/additional-repositories.list:1 and /etc/apt/sources.list.d/additional-repositories.list:2
W: Target Translations (partner/i18n/Translation-en_GB) is configured multiple times in /etc/apt/sources.list.d/additional-repositories.list:1 and /etc/apt/sources.list.d/additional-repositories.list:2
W: Target Translations (partner/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list.d/additional-repositories.list:1 and /etc/apt/sources.list.d/additional-repositories.list:2
W: The repository 'http://archive.canonical.com sarah Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Failed to fetch http://archive.canonical.com/dists/sarah/partner/binary-i386/Packages  404  Not Found [IP: 91.189.92.191 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.
W: Target Packages (partner/binary-i386/Packages) is configured multiple times in /etc/apt/sources.list.d/additional-repositories.list:1 and /etc/apt/sources.list.d/additional-repositories.list:2
W: Target Packages (partner/binary-all/Packages) is configured multiple times in /etc/apt/sources.list.d/additional-repositories.list:1 and /etc/apt/sources.list.d/additional-repositories.list:2
W: Target Translations (partner/i18n/Translation-en_GB) is configured multiple times in /etc/apt/sources.list.d/additional-repositories.list:1 and /etc/apt/sources.list.d/additional-repositories.list:2
W: Target Translations (partner/i18n/Translation-en) is configured multiple times in /etc/apt/sources.list.d/additional-repositories.list:1 and /etc/apt/sources.list.d/additional-repositories.list:2