Probleme de mise à jour de liste des paquets

Bonjour,
je travail mnt sur ubuntu 10.04, et j'ai dernierement installer des mise à jours mais après un probleme a surgi dans le gestionnaire des mises à jours, et me donne le message suivant:

Impossible d'initialiser les données sur les paquets

Un problème irrémédiable est survenu pendant l'initialisation des informations du paquet.

Veuillez signaler ce bogue du paquet « update-manager » en y joignant le message d'erreur suivant :

'W:Duplicate sources.list entry http://fr.archive.ubuntu.com/ubuntu/ jaunty/main Packages (/var/lib/apt/lists/fr.archive.ubuntu.com_ubuntu_dists_jaunty_main_binary-i386_Packages), W:Duplicate sources.list entry http://fr.archive.ubuntu.com/ubuntu/ jaunty/main Translation-fr (/var/lib/apt/lists/fr.archive.ubuntu.com_ubuntu_dists_jaunty_main_i18n_Translation-fr), W:Duplicate sources.list entry http://fr.archive.ubuntu.com/ubuntu/ jaunty/restricted Packages (/var/lib/apt/lists/fr.archive.ubuntu.com_ubuntu_dists_jaunty_restricted_binary-i386_Packages), W:Duplicate sources.list entry http://fr.archive.ubuntu.com/ubuntu/ jaunty/restricted Translation-fr (/var/lib/apt/lists/fr.archive.ubuntu.com_ubuntu_dists_jaunty_restricted_i18n_Translation-fr), W:Duplicate sources.list entry http://security.ubuntu.com/ubuntu/ jaunty-security/main Packages (/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_jaunty-security_main_binary-i386_Packages), W:Duplicate sources.list entry http://security.ubuntu.com/ubuntu/ jaunty-security/restricted Packages (/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_jaunty-security_restricted_binary-i386_Packages), W:Duplicate sources.list entry http://security.ubuntu.com/ubuntu/ jaunty-security/main Packages (/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_jaunty-security_main_binary-i386_Packages), W:Duplicate sources.list entry http://security.ubuntu.com/ubuntu/ jaunty-security/restricted Packages (/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_jaunty-security_restricted_binary-i386_Packages), W:Duplicate sources.list entry http://security.ubuntu.com/ubuntu/ jaunty-security/main Packages (/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_jaunty-security_main_binary-i386_Packages), W:Duplicate sources.list entry http://security.ubuntu.com/ubuntu/ jaunty-security/restricted Packages (/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_jaunty-security_restricted_binary-i386_Packages), W:Duplicate sources.list entry http://security.ubuntu.com/ubuntu/ jaunty-security/main Packages (/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_jaunty-security_main_binary-i386_Packages), W:Duplicate sources.list entry http://security.ubuntu.com/ubuntu/ jaunty-security/restricted Packages (/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_jaunty-security_restricted_binary-i386_Packages), W:Duplicate sources.list entry http://security.ubuntu.com/ubuntu/ jaunty-security/m