请教！！！方式不同结果不同

老师好！ OnInit() { //SubscribeBar("bu2306.SHFE","1d",20220101,0); //SubscribeBar("bu2306.SHFE","5m",20221101,0); SubscribeBar("CY301.DCE","1d",20220101,0); SubscribeBar("CY301.DCE","5m",20221101,0); } OnReady() { For i = 0 To data[id].GetSessionCount() - 1 { Numeric ret = data[id].GetSessionEndTime(i); Print("GetSessionEndTime:" + Text(ret)); print("GetSessionCount="+text(GetSessionCount())); } } 同一合约在公式中订阅，交易时段是 3，但在K线图标中调用公式，交易时段是4，这是什么原因？CY301为什么订阅不了？