__tablename__ = 'machines'
machine_number = Column(Integer, primary_key=True, nullable=False, autoincrement=False)
version_group_id = Column(Integer, ForeignKey('version_groups.id'), primary_key=True, nullable=False, autoincrement=False)
__tablename__ = 'machines'
machine_number = Column(Integer, primary_key=True, nullable=False, autoincrement=False)
version_group_id = Column(Integer, ForeignKey('version_groups.id'), primary_key=True, nullable=False, autoincrement=False)