[ArgumentOutOfRangeException: 'ddlBoat' has a SelectedValue which is invalid because it does not exist in the list of items.
Parameter name: value]
System.Web.UI.WebControls.ListControl.PerformDataBinding(IEnumerable dataSource) +1433
System.Web.UI.WebControls.ListControl.OnDataBinding(EventArgs e) +414
System.Web.UI.WebControls.ListControl.PerformSelect() +43
System.Web.UI.WebControls.BaseDataBoundControl.EnsureDataBound() +134
System.Web.UI.WebControls.ListControl.OnPreRender(EventArgs e) +36
System.Web.UI.Control.PreRenderRecursiveInternal() +200
System.Web.UI.Control.PreRenderRecursiveInternal() +297
System.Web.UI.Control.PreRenderRecursiveInternal() +297
System.Web.UI.Control.PreRenderRecursiveInternal() +297
System.Web.UI.Control.PreRenderRecursiveInternal() +297
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +7479
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