code: def unset_impact_state(self):
          
          cls = self.__class__
          if cls.enable_problem_impacts_states_change and not self.state_changed_since_impact:
              self.state = self.state_before_impact
              self.state_id = self.state_id_before_impact
docs: Unset impact, only if impact state change is set in configuration
  
          :return: None