Inheritance and ForeignKeys

[Shmookoff]

What have I done wrong?

Suppose we have following structure.
Some organization moments:

class MainMeta:
    database = database
    metadata = metadata

class AbstractMeta:
    abstract = True

class CommonModel(ormar.Model):
    class Meta(AbstractMeta):
        pass

    id: int = ormar.Integer(primary_key=True)
    ...

User model and mixin UserReference referencing a user.

class User(CommonModel):
    class Meta(MainMeta):
        pass

    telegram_id: int = ormar.Integer(minimum=1, unique=True)
    ...

class UserReference:
    user: User = ormar.ForeignKey(
        User,
        name="user_id",
        unique=True,
        nullable=False,
        skip_reverse=True,
        ondelete="CASCADE",
    )

Models that inherit from UserReference

class Courier(CommonModel, UserReference):
    class Meta(MainMeta):
        pass

    ...

class Selfemployed(CommonModel, UserReference):
    class Meta(MainMeta):
        tablename = "selfemployed"

    ...

For some reason, when I

await Courier.objects.get_or_none(Courier.user.telegram_id == 1)

... it raises an exception: asyncpg.exceptions.UndefinedTableError: missing FROM-clause entry for table "selfemployed"
Notice: I'm querying Courier model, not Selfemployed.

The resulting query is as follows:

SELECT couriers.id AS id, ..., vo40c1_users.id AS vo40c1_id, ...
FROM users AS js5485_users, couriers LEFT OUTER JOIN users AS vo40c1_users ON vo40c1_users.id=selfemployed.user_id 
WHERE (js5485_users.telegram_id = :telegram_id_1) ORDER BY couriers.id , vo40c1_users.id

Notice this part: ON vo40c1_users.id=selfemployed.user_id. It is trying to filter by a field from Selfemployed model, which isn't even related to the query.

So.. The question is: What have I done wrong?

upd

It seems that the query builder grabs the "tablename" of UserReference on JOIN, and the tablename gets redifined every time you inherit from it to the tablename of child.
If we swap Courier and Selfemployed so that Courier gets defined last, queries are built with couriers.user_id.

Defining UserReference as a Model, as well as adding a tablename to Meta of newly defined Model doesn't help.

Possibly a bug?