[BlueOnyx:01220] Error at yum update

[Eiji Hamano (bluequartz)]

Dear
Now I have two Blueonyx servers.
On the one Blueonyx,  I found Error at  "yum update" as follow.
I cannot update any  packages with YUM  !
Anyone advice me please.


>> yum update -y

Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * extras: ftp.iij.ad.jp
 * Solarspeed.net-AVSPAM-v5: mirror.smd.net
 * base: ftp.iij.ad.jp
 * BlueOnyx: blueonyx.precisionweb.net
 * Solarspeed.net: mirror.smd.net
 * addons: ftp.iij.ad.jp
 * updates: ftp.iij.ad.jp
Setting up Update Process
Resolving Dependencies
--> Running transaction check
---> Package tzdata.noarch 0:2009f-1.el5 set to be updated
---> ......................................................
---> ......................................................
---> Package php-pdo.i386 0:5.1.6-23.2.el5_3 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  ......................................................
  File  ......................................................
TypeError: unsubscriptable object

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Eiji Hamano