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    Thrown to indicate that a method has been passed an illegal or inappropriate argument. Check that you don't have more than one method existing with the same name.

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java.lang.IllegalArgumentException: object is not an instance of declaring class	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at org.hibernate.property.BasicPropertyAccessor$BasicGetter.get(BasicPropertyAccessor.java:145)	at org.hibernate.tuple.entity.AbstractEntityTuplizer.getIdentifier(AbstractEntityTuplizer.java:183)	at org.hibernate.persister.entity.AbstractEntityPersister.getIdentifier(AbstractEntityPersister.java:3596)	at org.hibernate.persister.entity.AbstractEntityPersister.isTransient(AbstractEntityPersister.java:3312)	at org.hibernate.engine.ForeignKeys.isTransient(ForeignKeys.java:181)	at org.hibernate.engine.ForeignKeys.getEntityIdentifierIfNotUnsaved(ForeignKeys.java:218)	at org.hibernate.type.EntityType.getIdentifier(EntityType.java:397)	at org.hibernate.type.EntityType.replace(EntityType.java:253)	at org.hibernate.type.MapType.replaceElements(MapType.java:73)	at org.hibernate.type.CollectionType.replace(CollectionType.java:552)	at org.hibernate.type.TypeFactory.replace(TypeFactory.java:482)	at org.hibernate.event.def.DefaultMergeEventListener.copyValues(DefaultMergeEventListener.java:340)	at org.hibernate.event.def.DefaultMergeEventListener.entityIsPersistent(DefaultMergeEventListener.java:153)	at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:126)	at org.hibernate.impl.SessionImpl.fireMerge(SessionImpl.java:687)	at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:669)	at org.hibernate.engine.CascadingAction$6.cascade(CascadingAction.java:245)	at org.hibernate.engine.Cascade.cascadeToOne(Cascade.java:268)	at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:216)	at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:169)	at org.hibernate.engine.Cascade.cascade(Cascade.java:130)	at org.hibernate.event.def.DefaultMergeEventListener.cascadeOnMerge(DefaultMergeEventListener.java:407)	at org.hibernate.event.def.DefaultMergeEventListener.entityIsPersistent(DefaultMergeEventListener.java:152)	at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:126)	at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:53)	at org.hibernate.impl.SessionImpl.fireMerge(SessionImpl.java:677)	at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:661)	at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:665)	at org.hibernate.ejb.AbstractEntityManagerImpl.merge(AbstractEntityManagerImpl.java:227)	at org.jboss.ejb3.entity.TransactionScopedEntityManager.merge(TransactionScopedEntityManager.java:188)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:112)	at org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:166)	at org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63)	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)	at org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:54)	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)	at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47)	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)	at org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:126)	at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:195)	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)	at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:95)	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)	at org.jboss.ejb3.stateless.StatelessInstanceInterceptor.invoke(StatelessInstanceInterceptor.java:62)	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)	at org.jboss.aspects.security.RoleBasedAuthorizationInterceptor.invoke(RoleBasedAuthorizationInterceptor.java:166)	at org.jboss.ejb3.security.RoleBasedAuthorizationInterceptor.invoke(RoleBasedAuthorizationInterceptor.java:115)	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)	at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77)	at org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:110)	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)	at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:46)	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)	at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106)	at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101)	at org.jboss.ejb3.stateless.StatelessContainer.localInvoke(StatelessContainer.java:240)	at org.jboss.ejb3.stateless.StatelessContainer.localInvoke(StatelessContainer.java:210)	at org.jboss.ejb3.stateless.StatelessLocalProxy.invoke(StatelessLocalProxy.java:84)	at undefined.$Proxy209.update(Unknown Source)