Ubuntu package install error as of today

W: Duplicate sources.list entry http://archive.ubuntu.com gutsy/main Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_gutsy_main_binary-i386_Packages)
W: Duplicate sources.list entry http://archive.ubuntu.com gutsy/restricted Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_gutsy_restricted_binary-i386_Packages)
W: Duplicate sources.list entry http://archive.ubuntu.com gutsy/universe Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_gutsy_universe_binary-i386_Packages)
W: Duplicate sources.list entry http://archive.ubuntu.com gutsy/multiverse Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_gutsy_multiverse_binary-i386_Packages)
W: Duplicate sources.list entry http://archive.ubuntu.com gutsy/main Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_gutsy_main_binary-i386_Packages)
W: Duplicate sources.list entry http://archive.ubuntu.com gutsy/restricted Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_gutsy_restricted_binary-i386_Packages)
W: Duplicate sources.list entry http://archive.ubuntu.com gutsy/universe Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_gutsy_universe_binary-i386_Packages)
W: Duplicate sources.list entry http://archive.ubuntu.com gutsy/multiverse Packages (/var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_gutsy_multiverse_binary-i386_Packages)


W: Duplicate sources.list entry http://us.archive.ubuntu.com gutsy/restricted Packages (/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_gutsy_restricted_binary-i386_Packages)
W: Duplicate sources.list entry http://us.archive.ubuntu.com gutsy/multiverse Packages (/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_gutsy_multiverse_binary-i386_Packages)
W: Duplicate sources.list entry http://us.archive.ubuntu.com gutsy/restricted Packages (/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_gutsy_restricted_binary-i386_Packages)
W: Duplicate sources.list entry http://us.archive.ubuntu.com gutsy/multiverse Packages (/var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_gutsy_multiverse_binary-i386_Packages)