Traceback (most recent call last):
  File "./scripts/noc-classifier.py", line 17, in <module>
    Classifier().process_command()
  File "/opt/noc/fm/classifier.py", line 427, in __init__
    Daemon.__init__(self)
  File "/opt/noc/lib/daemon.py", line 82, in __init__
    self.load_config()
  File "/opt/noc/fm/classifier.py", line 442, in load_config
    self.load_rules()
  File "/opt/noc/fm/classifier.py", line 470, in load_rules
    rule = Rule(self, r)
  File "/opt/noc/fm/classifier.py", line 167, in __init__
    self.event_class = rule.event_class
  File "/opt/noc/lib/nosql.py", line 103, in __get__
    self.document_type, value))
mongoengine.base.ValidationError: Unable to dereference <class 'noc.fm.models.EventClass'>:501686fb08255439df000000