[StaleStateException: Unexpected row count: 0; expected: 1]
   NHibernate.AdoNet.BasicExpectation.VerifyOutcomeNonBatched(Int32 rowCount, IDbCommand statement) +222
   NHibernate.AdoNet.NonBatchingBatcher.AddToBatch(IExpectation expectation) +28
   NHibernate.Persister.Entity.AbstractEntityPersister.Delete(Object id, Object version, Int32 j, Object obj, SqlCommandInfo sql, ISessionImplementor session, Object[] loadedState) +823
   NHibernate.Persister.Entity.AbstractEntityPersister.Delete(Object id, Object version, Object obj, ISessionImplementor session) +225
   NHibernate.Action.EntityDeleteAction.Execute() +333
   NHibernate.Engine.ActionQueue.Execute(IExecutable executable) +117
   NHibernate.Engine.ActionQueue.ExecuteActions(IList list) +94
   NHibernate.Engine.ActionQueue.ExecuteActions() +71
   NHibernate.Event.Default.AbstractFlushingEventListener.PerformExecutions(IEventSource session) +165
   NHibernate.Event.Default.DefaultAutoFlushEventListener.OnAutoFlush(AutoFlushEvent event) +117
   NHibernate.Impl.SessionImpl.AutoFlushIfRequired(ISet`1 querySpaces) +220
   NHibernate.Impl.SessionImpl.List(CriteriaImpl criteria, IList results) +319
   NHibernate.Impl.CriteriaImpl.List(IList results) +41
   NHibernate.Impl.CriteriaImpl.List() +61
   NHibernate.Linq.Visitors.ImmediateResultsVisitor`1.GetElementList(MethodCallExpression call, Int32 count) +158
   NHibernate.Linq.Visitors.ImmediateResultsVisitor`1.HandleFirstOrDefaultCall(MethodCallExpression call) +16
   NHibernate.Linq.Visitors.ImmediateResultsVisitor`1.VisitMethodCall(MethodCallExpression call) +368
   NHibernate.Linq.Visitors.ExpressionVisitor.Visit(Expression exp) +341
   NHibernate.Linq.Visitors.NHibernateExpressionVisitor.Visit(Expression exp) +204
   NHibernate.Linq.Visitors.ImmediateResultsVisitor`1.GetResults(MethodCallExpression expr) +12
   NHibernate.Linq.Visitors.RootVisitor.HandleImmediateResultsCall(MethodCallExpression call) +174
   NHibernate.Linq.Visitors.RootVisitor.VisitMethodCall(MethodCallExpression expr) +703
   NHibernate.Linq.Visitors.ExpressionVisitor.Visit(Expression exp) +341
   NHibernate.Linq.Visitors.NHibernateExpressionVisitor.Visit(Expression exp) +204
   NHibernate.Linq.Visitors.NHibernateQueryTranslator.Translate(Expression expression, QueryOptions queryOptions) +85
   NHibernate.Linq.NHibernateQueryProvider.TranslateExpression(Expression expression) +225
   NHibernate.Linq.NHibernateQueryProvider.Execute(Expression expression) +14
   NHibernate.Linq.QueryProvider.System.Linq.IQueryProvider.Execute(Expression expression) +29
   System.Linq.Queryable.FirstOrDefault(IQueryable`1 source) +269
   Be.HorecaTouch.Core.Services.Implementations.OrderService.GetCurrentOrder(String companyref, String customerref) in C:\Projecten\Be.HorecaTouch.Web\Src\Be.HorecaTouch.Core\Services\Implementations\OrderService.cs:47
   Be.HorecaTouch.Web.Controllers.OrderController.get_CurrentOrder() in C:\Projecten\Be.HorecaTouch.Web\Src\Be.HorecaTouch.Web\Controllers\OrderController.cs:36
   Be.HorecaTouch.Web.Controllers.OrderController.OrderOverview(String companyref) in C:\Projecten\Be.HorecaTouch.Web\Src\Be.HorecaTouch.Web\Controllers\OrderController.cs:0
   lambda_method(ExecutionScope , ControllerBase , Object[] ) +86
   System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) +17
   System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +178
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +24
   System.Web.Mvc.<>c__DisplayClassa.<InvokeActionMethodWithFilters>b__7() +53
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) +258
   System.Web.Mvc.<>c__DisplayClassc.<InvokeActionMethodWithFilters>b__9() +20
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +193
   System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +375
   System.Web.Mvc.Controller.ExecuteCore() +127
   System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +36
   System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext) +7
   System.Web.Mvc.MvcHandler.ProcessRequest(HttpContextBase httpContext) +144
   System.Web.Mvc.MvcHandler.ProcessRequest(HttpContext httpContext) +54
   System.Web.Mvc.MvcHandler.System.Web.IHttpHandler.ProcessRequest(HttpContext httpContext) +7
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +181
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +75