Невозможно обновить Ubuntu Ubuntu 14.04.4 LTS. Неправильная запись sources.list или неверно сформированный файл

Я не могу обновить свои репозитории Ubuntu. Команда apt-get update выдает следующую ошибку

W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/trusty-updates/InRelease  Unable to find expected entry 'main/binary-aarch64/Packages' in Release file (Wrong sources.list entry or malformed file)
W: Failed to fetch http://ppa.launchpad.net/hugin/hugin-builds/ubuntu/dists/trusty/InRelease Unable to find expected entry 'main/binary-aarch64/Packages' in Release file (Wrong sources.list entry or malformed file)
W: Failed to fetch https://deb.opera.com/opera-stable/dists/stable/InRelease  Unable to find expected entry 'non-free/binary-aarch64/Packages' in Release file (Wrong sources.list entry or malformed file)
W: Failed to fetch https://packagecloud.io/slacktechnologies/slack/debian/dists/jessie/InRelease Unable to find expected entry 'main/binary-aarch64/Packages' in Release file (Wrong sources.list entry or malformed file)
W: Failed to fetch http://ppa.launchpad.net/rabbitvcs/ppa/ubuntu/dists/trusty/Release  Unable to find expected entry 'main/binary-aarch64/Packages' in Release file (Wrong sources.list entry or malformed file)
W: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/trusty/Release  Unable to find expected entry 'main/binary-aarch64/Packages' in Release file (Wrong sources.list entry or malformed file)
E: Some index files failed to download. They have been ignored, or old ones used instead

Я даже заменил свой файл sources.list на файл, сгенерированный мной с помощью Ubuntu Sources List Generator . Это мой файл sources.list .

###### Ubuntu Main Repos
deb http://us.archive.ubuntu.com/ubuntu/ trusty main universe multiverse  
deb-src http://us.archive.ubuntu.com/ubuntu/ trusty main universe multiverse 

###### Ubuntu Update Repos
deb http://us.archive.ubuntu.com/ubuntu/ trusty-updates main universe multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ trusty-updates main universe multiverse