多对一双向关联删除子类关于临时对象的问题

最近我在项目中加入多对一双向关联的做法 因为以前没涉及过hibernate级联删除问题 我建立了几个多对一关联的双向关联,下面是我的代码:

Customer.hbm.xml

...省略其它Customer属性
		<set name="msges" inverse="true" cascade="all">
		<key column="RecCustomer_id"/>
		<one-to-many class="EricMsg"/>
		</set>
		<set name="msgess" inverse="true" cascade="all">
		<key column="SendCustomer_id"/>
		<one-to-many class="EricMsg"/>
		</set>

		<set name="ericpingluns" lazy="true" inverse="true" cascade="all">
		<key column="EricPingLun_id"/>
		<one-to-many class="EricPingLun"/>
		</set>
下面还有几个同样的set属性... 

Customer.java

...
	  private Set ericNewses=new HashSet(); //关系 1:n
	  private Set ericpingluns=new HashSet();//关系 1:n

EricMsg.java

...
	private Customer sendcustomer;
	private Customer reccustomer;

EricMsg.hbm.xml

        <many-to-one 
        name="sendcustomer" 
        column="SendCustomer_id" 
        class="Customer"/>

        
        <many-to-one name="reccustomer" 
        column="RecCustomer_id" 
        class="Customer"/>

现在Customer登录后,察看到自己的消息,察看完毕后,想删除掉Ericmsg.可是总是删除的时候出现

deleted object would be re-saved by cascade 

有的时候也会出现说

session would be used or session would be closed

我的 删除 Action中只是把ID传过去 然后利用接口的

	public void deleteEricMsg(EricMsg ericmsg) throws ServicesException {
	    this.delete(ericmsg);	
	}

我觉得主要的把我获取留言的类贴出来,我自己觉得是这里出了问题
CheckCustomerMsgAction

	private Customer customer;
	private Set ericmsges=new HashSet();
	public String execute()throws Exception{

			customer=super.getCustomer();
			if(this.customer!=null){
				   if(customer.getMsges().size()>0){
					   ericmsges=customer.getMsges();
					   return SUCCESS;
				   }
				return INPUT;
			}
			return INPUT;		
	}

我改了很多 可是依旧无法解决这个问题,我想达到的是能删除Msg 用户再次Check后不能再看到那条消息,我现在却依旧可以看到msg这个临时对象