sqlalchemy foreign key

Подскажите пожалуйста получаю такую ошибку:

sqlalchemy.exc.NoReferencedTableError: Foreign key associated with column 'setevik.category' could not find table 'category' with which to generate a foreign key to target column 'id'

и непосредственно код

class Category(Base):

    def __init__(self, id=None, name=None):
        self.name = name
        self.id = id

    __tablename__ = Table('category', Main().create_metadata(), autoload=True)

    id = Column(Integer, primary_key=True, unique=True)
    name = Column(unique=True)


class News(Base):

    def __init__(
            self, id=None, title=None, body=None,
            date=None, time=None, category=None, tegs=None
    ):
        self.id = id
        self.title = title
        self.body = body
        self.date = date
        self.time = time
        self.category = category
        self.tegs = tegs

    __tablename__ = Table('setevik', Main().create_metadata(), autoload=True)

    id = Column(primary_key=True)
    title = Column()
    body = Column()
    date = Column()
    time = Column()
    category = Column(Integer, ForeignKey('category.id'))
    tegs = Column(nullable=True)