This error message means that the Position Mode defined on your exchange account which is connected to this Cornix Account (Client) differs from the Position Mode set up under this Account (Client) trading configuration.
When setting the Position Mode under Cornix Trading Configuration this will automatically change the Position Mode on your account directly on the exchange. When changing it directly on the exchange it won't adjust Cornix Trading Configuration.
For more information on how to change your trading preference from "One-Way Mode" to "Hedge Mode" on Binance Futures and Bybit USDT.
Note for KuCoin Futures:
If you receive this cancellation message for KuCoin Futures trades, it’s because Hedge Mode in KuCoin is not yet supported by Cornix.
To resolve this, please change your position mode on the exchange to One-Way Mode.