EDIT

changing the Flush mode in is most likely obsolete:

 /**
    * Regarding changing the Flush mode see see also {@link ViewScopeConversationHolder}
    *
    * @param saveEvent
    */
   @EventBusListenerMethod
   public void onEditorDeleteEvent(Event<EditorDeleteEvent<DTO>> deleteEvent){

       FlushMode previousFlushMode = getSession().getFlushMode();
       getSession().setFlushMode(FlushMode.AUTO);
       deleteBean(deleteEvent.getPayload().getBean());
       getSession().setFlushMode(previousFlushMode);
   }