Cannot override writable attribute with a final one

[fr0der1c]

The below code should pass the check:

class MongoDAOBase(abc.ABC):
    collection_name: str = NotImplemented

    @classmethod
    @abc.abstractmethod
    def create_index(cls) -> None:
        pass


class PrivacySettingsDAO(MongoDAOBase):
    collection_name: Final = "privacy_settings" # complains

    @classmethod
    def create_index(cls) -> None:
        pass

However, a T484 Cannot override writable attribute "collection_name" with a final oneis raised. This problem seems to be introduced recently. My local version (which is older) of flake8-mypy and mypy does not complain, but it fails in CI environment (which gets later version). I'm not sure if this is a flake8-mypy problem or mypy problem, so I just ask here first.