Description of problem:
this problem appear when i use : yum update or yum install any package

Version-Release number of selected component:
yum-3.4.3-152.fc20

Additional info:
reporter:       libreport-2.2.3
cmdline:        /usr/bin/python /usr/bin/yum update
executable:     /usr/bin/yum
kernel:         3.15.5-200.fc20.x86_64
runlevel:       N 5
type:           Python
uid:            0

Truncated backtrace:
sqlutils.py:166:executeSQLQmark:DatabaseError: file is encrypted or is not a database

Traceback (most recent call last):
  File "/usr/bin/yum", line 29, in <module>
    yummain.user_main(sys.argv[1:], exit_code=True)
  File "/usr/share/yum-cli/yummain.py", line 371, in user_main
    errcode = main(args)
  File "/usr/share/yum-cli/yummain.py", line 277, in main
    return_code = base.doTransaction(inhibit=inhibit)
  File "/usr/share/yum-cli/cli.py", line 797, in doTransaction
    resultobject = self.runTransaction(cb=cb)
  File "/usr/lib/python2.7/site-packages/yum/__init__.py", line 1776, in runTransaction
    lastdbv = self.history.last()
  File "/usr/lib/python2.7/site-packages/yum/history.py", line 1267, in last
    ret = self.old([], 1, complete_transactions_only)
  File "/usr/lib/python2.7/site-packages/yum/history.py", line 1216, in old
    executeSQL(cur, sql, params)
  File "/usr/lib/python2.7/site-packages/yum/sqlutils.py", line 166, in executeSQLQmark
    return cursor.execute(query)
DatabaseError: file is encrypted or is not a database

Local variables in innermost frame:
cursor: <sqlite3.Cursor object at 0x38e9d50>
query: 'SELECT tid,\n                         trans_beg.timestamp AS beg_ts,\n                         trans_beg.rpmdb_version AS beg_rv,\n                         trans_end.timestamp AS end_ts,\n                         trans_end.rpmdb_version AS end_rv,\n                         loginuid, return_code\n                  FROM trans_beg JOIN trans_end USING(tid) ORDER BY tid DESC LIMIT 1'
params: None