Problem with MergeList

お仕事 Debian

apt-get でエラーが出るようになった．

Reading package lists... Error!
E: Problem parsing dependency Depends
E: Error occurred while processing avahi-dnsconfd (NewVersion1)
E: Problem with MergeList /var/lib/apt/lists/ftp2.jp.debian.org_debian_dists_lenny_main_binary-amd64_Packages
E: The package lists or status file could not be parsed or opened.
# mv /var/lib/apt/lists/ftp2.jp.debian.org_debian_dists_lenny_main_binary-amd64_Packages /var/lib/apt/lists/ftp2.jp.debian.org_debian_dists_lenny_main_binary-amd64_Packages.org
# apt-get update

で，解決．