500 Internal Server Error

The server encountered an unexpected condition which prevented it from fulfilling the request.

Traceback (most recent call last):
  File "/usr/share/sabnzbdplus/cherrypy/_cprequest.py", line 670, in respond
    response.body = self.handler()
  File "/usr/share/sabnzbdplus/cherrypy/lib/encoding.py", line 220, in __call__
    self.body = self.oldhandler(*args, **kwargs)
  File "/usr/share/sabnzbdplus/cherrypy/_cpdispatch.py", line 60, in __call__
    return self.callable(*self.args, **self.kwargs)
  File "/usr/share/sabnzbdplus/sabnzbd/interface.py", line 127, in internal_wrap
    return wrap_func(*args, **kwargs)
  File "/usr/share/sabnzbdplus/sabnzbd/interface.py", line 413, in index
    history['slots'], fetched_items, history['noofslots'] = build_history(limit=cfg.history_limit(), output='json')
  File "/usr/share/sabnzbdplus/sabnzbd/api.py", line 1818, in build_history
    items = get_active_history(queue, items)
  File "/usr/share/sabnzbdplus/sabnzbd/api.py", line 1890, in get_active_history
    history = build_history_info(nzo)
  File "/usr/share/sabnzbdplus/sabnzbd/database.py", line 486, in build_history_info
    lines.append('%s:::%s' % (key, ';'.join(results)))
TypeError: sequence item 0: expected string, int found