救救我吧我的YUM完蛋了不知道咋办

YUM 更新不了

yum update
已加载插件：fastestmirror, presto, refresh-packagekit
Repository updates is listed more than once in the configuration
Repository updates-debuginfo is listed more than once in the configuration
Repository updates-source is listed more than once in the configuration
Repository fedora is listed more than once in the configuration
Repository fedora-debuginfo is listed more than once in the configuration
Repository fedora-source is listed more than once in the configuration
Loading mirror speeds from cached hostfile
updates/metalink | 9.1 kB 00:00
updates-source/metalink | 7.9 kB 00:00
updates-testing-source/metalink | 7.3 kB 00:00
* fedora: mirror.lupaworld.com
* fedora-source: mirror.lupaworld.com
* livna: rpm.livna.org
* livna-source: rpm.livna.org
* updates: mirror.lupaworld.com
* updates-source: mirror.lupaworld.com
* updates-testing-source: mirror.lupaworld.com
http://rpm.pidgin.im/fedora/13/x86_64/repodata/repomd.xml: [Errno 14] HTTP Error 404 : http://rpm.pidgin.im/fedora/13/x86_64/repodata/repomd.xml
尝试其他镜像。
错误：Cannot retrieve repository metadata (repomd.xml) for repository: pidgin. Please verify its path and try again