def update_sqalchemy_zone_config(table_name, zone_name, field_name, field_value):
    metadata = MetaData(bind=None)
    table = Table(table_name, metadata, autoload=True, autoload_with=engine)
    stmt = table.update().where(table.c.name == zone_name).values({field_name : field_value})
    connection = engine.connect()
    connection.execute(stmt)
    connection.close()