αποτυχια ληψης πληροφοριων αποθετηριου

καλησπερα κ χρονια πολλα! προσπαθω να κανω ενημερωση λογισμικου σε ubuntu 16.04 κ μου βγαζει αυτο

W:Target Sources (partner/source/Sources) is configured multiple times in /etc/apt/sources.list:41 and /etc/apt/sources.list:44, W:Target Sources (partner/source/Sources) is configured multiple times in /etc/apt/sources.list:41 and /etc/apt/sources.list:45, W:Target Sources (main/source/Sources) is configured multiple times in /etc/apt/sources.list.d/ubuntu-wine-ubuntu-ppa-xenial.list:2 and /etc/apt/sources.list.d/ubuntu-wine-ubuntu-ppa-xenial.list:3, W:The repository 'http://ppa.launchpad.net/speed-dreams/ppa/ubuntu xenial Release' does not have a Release file., W:Data from such a repository can't be authenticated and is therefore potentially dangerous to use., W:See apt-secure(8) manpage for repository creation and user configuration details., E:Failed to fetch http://ppa.launchpad.net/speed-dreams/ppa/ubuntu/dists/xenial/main/binary-amd64/Packages 404 Not Found, E:Some index files failed to download. They have been ignored, or old ones used instead.

ευχαριστω για τη βοηθεια.