def set_live_from(self):  # type: ignore[no-untyped-def]
        """
        Set the live_from date on newly created, version 1 feature states to maintain
        the previous behaviour.
        """
        if (
            self.environment.use_v2_feature_versioning is False  # type: ignore[union-attr]
            and self.version is not None
            and self.live_from is None
        ):
            self.live_from = timezone.now()

        Set the live_from date on newly created, version 1 feature states to maintain
        the previous behaviour.
        
api/features/models.py