求助

Traceback (most recent call last):
File "/usr/share/PackageKit/helpers/yum/yumBackend.py", line 1215, in _get_depends_not_installed
rc, msgs = self.yumbase.buildTransaction()
File "/usr/lib/python2.6/site-packages/yum/__init__.py", line 717, in buildTransaction
(rescode, restring) = self.resolveDeps()
File "/usr/lib/python2.6/site-packages/yum/depsolve.py", line 699, in resolveDeps
CheckDeps, checkinstalls, checkremoves, missing = self._resolveRequires(errors)
File "/usr/lib/python2.6/site-packages/yum/depsolve.py", line 784, in _resolveRequires
thisneeds = self._checkInstall(txmbr)
File "/usr/lib/python2.6/site-packages/yum/depsolve.py", line 856, in _checkInstall
provs = self.tsInfo.getProvides(*req)
File "/usr/lib/python2.6/site-packages/yum/transactioninfo.py", line 442, in getProvides
result.update(self.getNewProvides(name, flag, version))
File "/usr/lib/python2.6/site-packages/yum/transactioninfo.py", line 424, in getNewProvides
for pkg, hits in self.pkgSack.getProvides(name, flag, version).iteritems():
File "/usr/lib/python2.6/site-packages/yum/packageSack.py", line 327, in getProvides
return self._computeAggregateDictResult("getProvides", name, flags, version)
File "/usr/lib/python2.6/site-packages/yum/packageSack.py", line 497, in _computeAggregateDictResult
sackResult = apply(method, args)
File "/usr/lib/python2.6/site-packages/yum/sqlitesack.py", line 882, in getProvides
return self._search("provides", name, flags, version)
File "/usr/lib/python2.6/site-packages/yum/sqlitesack.py", line 44, in newFunc
return func(*args, **kwargs)
File "/usr/lib/python2.6/site-packages/yum/sqlitesack.py", line 858, in _search
for pkg in self.searchFiles(name, strict=True):
File "/usr/lib/python2.6/site-packages/yum/sqlitesack.py", line 53, in newFunc
raise Errors.RepoError, str(e)
RepoError: database disk image is malformed


有谁知道上面是怎么回事！！谢谢！