I have been fighting with a error that I just can't see why happens - so now I ask you smart people. I have a entitybean with a one to one connection to another entity bean. When I try to change the username like this: | Subscriber sub = (Subscriber) em.createQuery("...").getSingleResult(); | sub.setUserName("newusername"); //notice that setUserName actually is getRoles().setUserName("newusername"); | sub.setPassword("newpassword"); | sub.getRoles().setRoles("newRole"); | //autocommit | I get the following exception: 13:01:46,730 INFO [MpSupport-web] signupStep1 error, java.lang.RuntimeException: org.jboss.tm.JBossRollbackException: Unable to commit, tx=TransactionImpl:XidImpl[FormatId=257, GlobalId=nicolai/87, BranchQual=, localId=87] status=STATUS_NO_TRANSACTION; - nested throwable: (javax.persistence.PersistenceException: org.hibernate.HibernateException: identifier of an instance of dk.niro.mpsuite.persist.SubscriberRoles was altered from oldusername to newusername) But why?? | @Entity | public class Subscriber implements Serializable{ | ... | @OneToOne(cascade={CascadeType.ALL}, optional=false) | @JoinColumn(name="username", unique=true) | public SubscriberRoles getRoles() { | return roles; | } | | public void setRoles(SubscriberRoles roles) { | this.roles = roles; | } | | public void setUserName(String username) { | getRoles().setUserName(username); | } | | @Transient | public String getUserName(){ | return getRoles().getUserName(); | } | } | | @Entity | public class SubscriberRoles implements Serializable{ | | private String userName; | | private String roles; | | public SubscriberRoles(){} | | public SubscriberRoles(String username, String roles){ | userName = username; | this.roles = roles; | } | public String getRoles() { | return roles; | } | | public void setRoles(String roles) { | this.roles = roles; | } | | @Id | public String getUserName() { | return userName; | } | | public void setUserName(String userName) { | this.userName = userName; | } | } | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3972278#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...