yum这是什么错误？

Heefan

[root@LiT Desktop]# yum install ddd
Loading "protectbase" plugin
Loading "fedorakmod" plugin
Loading "kernel-module" plugin
Loading "changelog" plugin
Loading "skip-broken" plugin
Loading "downloadonly" plugin
Loading "allowdowngrade" plugin
Loading "tsflags" plugin
Loading "priorities" plugin
Loading "fastestmirror" plugin
Loading "installonlyn" plugin
Setting up Install Process
Setting up repositories
Loading mirror speeds from cached hostfile
Reading repository metadata in from local files
0 packages excluded due to repository protections
0 packages excluded due to repository priority protections
Parsing package install arguments
Resolving Dependencies
Traceback (most recent call last):
  File "/usr/bin/yum", line 29, in ?
    yummain.main(sys.argv[1:])
  File "/usr/share/yum-cli/yummain.py", line 135, in main
    (result, resultmsgs) = base.buildTransaction()
  File "/usr/lib/python2.4/site-packages/yum/__init__.py", line 440, in buildTransaction
    self.plugins.run('preresolve')
  File "/usr/lib/python2.4/site-packages/yum/plugins.py", line 153, in run
    func(conduitcls(self, self.base, conf, **kwargs))
  File "/usr/lib/yum-plugins/kernel-module.py", line 60, in preresolve_hook
    instpkgs = conduit.getRpmDB().getPackages()
AttributeError: 'RPMDBPackageSack' object has no attribute 'getPackages'

怎么回事，谁知道？请提示一下～