RenderUtils.invalidateViewState();
    public ActionForward chooseLastSummary(ActionMapping mapping, ActionForm form,	    HttpServletRequest request, HttpServletResponse response) {	final IViewState viewState = RenderUtils.getViewState();	SummariesManagementBean bean = (SummariesManagementBean) viewState.getMetaObject().getObject();	Summary lastSummary = bean.getLastSummary();	if (lastSummary != null) {	    bean.setSummaryText(lastSummary.getSummaryText());	    bean.setTitle(lastSummary.getTitle());	    bean.setLessonPlanning(null);	}	return goToSummaryManagementPage(mapping, request, (DynaActionForm)form, bean);    }