[ChangeConflictException: Row not found or changed.]
System.Data.Linq.ChangeProcessor.SubmitChanges(ConflictMode failureMode) +1236
System.Data.Linq.DataContext.SubmitChanges(ConflictMode failureMode) +681
Controller.Config.Addvister() +328
MVC_Kutun.Global.Session_Start(Object sender, EventArgs e) +454
System.Web.SessionState.SessionStateModule.CompleteAcquireState() +375
System.Web.SessionState.SessionStateModule.BeginAcquireState(Object source, EventArgs e, AsyncCallback cb, Object extraData) +1257
System.Web.AsyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +703
System.Web.HttpApplication.ExecuteStepImpl(IExecutionStep step) +75
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +158
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