IB Python API中PEG BEST订单因PostToAts属性报错无法提交的问题求助

我在Python脚本里尝试提交PEG BEST订单时遇到了麻烦——订单能在Trader Workstation里显示，但就是无法被传输出去。Python控制台里弹出了这两条错误提示：

Error 68 1773000244085 10274 The 'PostToATS' order attribute may not be specified for this order or is invalid.
Error 67 1773000244000 201 Order rejected - reason:This order type is not allowed w/o PostToAts for specified destination

以下是我代码里的核心部分：

o = Order()

o.action = action
o.orderType = "PEG BEST"
o.totalQuantity = qty
o.lmtPrice = round(limit_price, 2)
o.exchange = "IBKRATS"
o.tif = "DAY"
o.competeAgainstBestOffset = 0.02
o.midOffsetAtWhole = mid_offset_whole
o.midOffsetAtHalf = mid_offset_half
o.postToAts = 1

self.placeOrder(oid, self.contract, o)

不管我用API版本10.37.02还是10.44.01，都会弹出同样的错误提示。

我试过用AI查询但没找到有用的解决办法，希望能得到大家的建议！

备注：内容来源于stack exchange，提问作者Adam Wildavsky