[Zope] Correpted Error while Packing zope databse

[atiwari at zeomega.com]

hi all,

   I am using Zope-2.7.5 final version with Python-2.3.5.
   I have a problem in packing of Database, whenever i click on Pack
button within ControlPanel/Database/main,
i am receiving error as Correpted error

Log is as follows

    *  Module ZODB.DB, line 555, in pack
    * Module ZODB.FileStorage, line 1582, in pack
    * Module ZODB.fspack, line 700, in pack
    * Module ZODB.fspack, line 455, in findReachable
    * Module ZODB.fspack, line 475, in buildPackIndex
    * Module ZODB.fspack, line 166, in checkTxn
    * Module ZODB.fspack, line 161, in fail

CorruptedError: /srv/sites/intrapmo/var/Data.fs:298657432:time-stamp
reduction: 0x035f3aa3f3818c55 <= 0x035f3f0dfa5d0289

i am not getting why excatly this error is comming.
any suggessions or solutions from your side is most welcome

Thanking You
Anand Tiwari