在訂單中ORDERS，把A部門為B部門，出現
identifier of an instance of com.kink.model.Department altered from 2 to 4; nested exception is org.hibernate.HibernateException: identifier of an instance of com.kink.model.Department altered from 2 to 4 ,是不是哪個地方沒設置好,2是A部門原來的值，4是要修改成的值。
注:Orders表的字段為 id(PK),dept_id(FK),remark,
Order_item 表的字段為id,order_id(FK),item_no,qty,price,
Department 表的字段為id(PK),code,name,
出現以上操作錯誤是在對orders進行UPDATE時出現的，步驟是取出Orders 然后把訂單中的A部門修改成B部門，就出現錯誤，而我卻沒有對Department表進行操作，不知道是怎么回事，請問有人知道原因嗎
Q：identifier of an instance of com.lanhan.poos.vo.Ck was altered from 1 to 2; nested exception is org.hibernate.HibernateException: identifier of an instance of com.lanhan.poos.vo.Ck was altered from 1 to 2
Stack Trace is :
org.springframework.orm.hibernate3.HibernateSystemException: identifier of an instance of com.lanhan.poos.vo.Ck was altered from 1 to 2; nested exception is org.hibernate.HibernateException: identifier of an instance of com.lanhan.poos.vo.Ck was altered from 1 to 2
Caused by: org.hibernate.HibernateException: identifier of an instance of com.lanhan.poos.vo.Ck was altered from 1 to 2
?at org.hibernate.event.def.DefaultFlushEntityEventListener.checkId(DefaultFlushEntityEventListener.java:51)
?at org.hibernate.event.def.DefaultFlushEntityEventListener.getValues(DefaultFlushEntityEventListener.java:150)
?at org.hibernate.event.def.DefaultFlushEntityEventListener.onFlushEntity(DefaultFlushEntityEventListener.java:106)
?at org.hibernate.event.def.AbstractFlushingEventListener.flushEntities(AbstractFlushingEventListener.java:195)
?at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:76)
?at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:26)
?at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1009)
?at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:356)
?at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)
?at org.springframework.orm.hibernate3.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:580)
?at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:539)
?at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:509)
?at org.springframework.transaction.interceptor.TransactionAspectSupport.doCommitTransactionAfterReturning(TransactionAspectSupport.java:275)
?at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
?at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:170)
?at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:647)
?at com.lh.pos.dao.impl.BorrowDAOImpl$$EnhancerByCGLIB$$61171362.updateBorrow()
?at com.lh.pos.web.ck.BorrowController.update(BorrowController.java:152)
?at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
?at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
?at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
?at java.lang.reflect.Method.invoke(Unknown Source)
?at org.apache.commons.beanutils.MethodUtils.invokeMethod(MethodUtils.java:216)
?at org.apache.commons.beanutils.MethodUtils.invokeMethod(MethodUtils.java:162)
?at org.apache.commons.beanutils.MethodUtils.invokeMethod(MethodUtils.java:114)
?at com.lh.pos.web.ck.BorrowController.handleRequest(BorrowController.java:67)
?at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:45)
?at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:798)
?at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:728)
?at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:396)
?at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:360)
?at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
?at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
?at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
?at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
?at org.extremecomponents.table.filter.AbstractExportFilter.doFilter(AbstractExportFilter.java:49)
?at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
?at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
?at filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:151)
?at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
?at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
?at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
?at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
?at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
?at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
?at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
?at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
?at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:833)
?at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:639)
?at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1285)
?at java.lang.Thread.run(Unknown Source)
更新記錄時出錯以上錯誤，有知道問題的答案嗎，很想搞清楚問題出在哪里
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