Traceback (most recent call last):
  File "/usr/share/software-center/softwarecenter/ui/gtk3/widgets/apptreeview.py", line 450, in _cell_data_func_cb
    model.load_range(indices, 5)
  File "/usr/share/software-center/softwarecenter/ui/gtk3/models/appstore2.py", line 423, in load_range
    doc = db.get_document(matches[i].docid)
DocNotFoundError: Docid 817 not found