[KeyNotFoundException: 给定关键字不在字典中。]
System.ThrowHelper.ThrowKeyNotFoundException() +28
System.Collections.Generic.Dictionary`2.get_Item(TKey key) +7672492
Otree.Web.history.Page_Load(Object sender, EventArgs e) in G:\章辉\2023\202302\兄弟包装\程序\Otree.Web\history.aspx.cs:29
System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
System.Web.UI.Control.OnLoad(EventArgs e) +99
System.Web.UI.Control.LoadRecursive() +50
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627
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