def copy_relations(self, oldinstance):
        self.departments.set(oldinstance.departments.all())
        self.event_types.set(oldinstance.event_types.all())
        self.groups.set(oldinstance.groups.all())
        self.age_groups.set(oldinstance.age_groups.all())
        self.target_groups.set(oldinstance.age_groups.all())
        self.leaders.set(oldinstance.leaders.all())