Traceback (most recent call last):
  File "/usr/share/software-center/softwarecenter/models/appstore.py", line 493, in on_get_value
    if self.db.is_appname_duplicated(appname):
  File "/usr/share/software-center/softwarecenter/db/database.py", line 396, in is_appname_duplicated
    for (i, m) in enumerate(self.xapiandb.postlist("AA"+appname)):
  File "/usr/lib/python2.7/dist-packages/xapian/__init__.py", line 6656, in next
    return PostingItem(self)
  File "/usr/lib/python2.7/dist-packages/xapian/__init__.py", line 6583, in __init__
    self.doclength = iter._iter.get_doclength()
DocNotFoundError: Document 714 not found