yum error (file, x86_64) Centos 5

[root@hogwarts ~]# yum update
Loaded plugins: fastestmirror, priorities
Loading mirror speeds from cached hostfile
Setting up Update Process
Resolving Dependencies
--> Running transaction check
---> Package kernel-xen-devel.x86_64 0:2.6.18-128.1.10.el5 set to be installed
---> Package audit.x86_64 0:1.7.7-6.el5_3.3 set to be updated
---> Package audit-libs.i386 0:1.7.7-6.el5_3.3 set to be updated
---> Package sos.noarch 0:1.7-9.16.el5_3.5 set to be updated
---> Package kexec-tools.x86_64 0:1.102pre-56.el5_3.2 set to be updated
---> Package audit-libs.x86_64 0:1.7.7-6.el5_3.3 set to be updated
---> Package kernel-headers.x86_64 0:2.6.18-128.1.10.el5 set to be updated
---> Package kernel.x86_64 0:2.6.18-128.1.10.el5 set to be installed
---> Package audit-libs-python.x86_64 0:1.7.7-6.el5_3.3 set to be updated
---> Package kernel-xen.x86_64 0:2.6.18-128.1.10.el5 set to be installed
---> Package pango.x86_64 0:1.14.9-5.el5.centos set to be updated
---> Package file.x86_64 0:4.17-15.el5_3.1 set to be updated
Traceback (most recent call last):
  File "/usr/bin/yum", line 29, in ?
    yummain.user_main(sys.argv[1:], exit_code=True)
  File "/usr/share/yum-cli/yummain.py", line 229, in user_main
    errcode = main(args)
  File "/usr/share/yum-cli/yummain.py", line 145, in main
    (result, resultmsgs) = base.buildTransaction() 
  File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 647, in buildTransaction
    (rescode, restring) = self.resolveDeps()
  File "/usr/lib/python2.4/site-packages/yum/depsolve.py", line 704, in resolveDeps
    for po, dep in self._checkFileRequires():
  File "/usr/lib/python2.4/site-packages/yum/depsolve.py", line 939, in _checkFileRequires
    if not self.tsInfo.getOldProvides(filename) and not self.tsInfo.getNewProvides(filename):
  File "/usr/lib/python2.4/site-packages/yum/transactioninfo.py", line 414, in getNewProvides
    for pkg, hits in self.pkgSack.getProvides(name, flag, version).iteritems():
  File "/usr/lib/python2.4/site-packages/yum/packageSack.py", line 300, in getProvides
    return self._computeAggregateDictResult("getProvides", name, flags, version)
  File "/usr/lib/python2.4/site-packages/yum/packageSack.py", line 470, in _computeAggregateDictResult
    sackResult = apply(method, args)
  File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 861, in getProvides
    return self._search("provides", name, flags, version)
  File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 43, in newFunc
    return func(*args, **kwargs)
  File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 837, in _search
    for pkg in self.searchFiles(name, strict=True):
  File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 43, in newFunc
    return func(*args, **kwargs)
  File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 586, in searchFiles
    self._sql_pkgKey2po(rep, cur, pkgs)
  File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 470, in _sql_pkgKey2po
    pkg = self._packageByKey(repo, ob['pkgKey'])
  File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 413, in _packageByKey
    po = self.pc(repo, cur.fetchone())
  File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 68, in __init__
    self._read_db_obj(db_obj)
  File "/usr/lib/python2.4/site-packages/yum/sqlitesack.py", line 94, in _read_db_obj
    setattr(self, item, _share_data(db_obj[item]))
TypeError: unsubscriptable object