I am getting an error when I run Jboss server that says.. | --- MBeans waiting for other MBeans --- | ObjectName: persistence.units:jar=SourceCode.jar,unitName=SourceCodePU | State: FAILED | Reason: javax.persistence.PersistenceException: org.hibernate.MappingException: Repeated column in mapping for entity: EntityBean.KnowledgeBase column: projectID (should be mapped with insert="false" update="false") | I Depend On: | jboss.jca:service=DataSourceBinding,name=SQL | Depends On Me: | jboss.j2ee:jar=SourceCode.jar,name=ClassificationBeanFinal,service=EJB3 | This is my code | @JoinColumn(name = "projectID", referencedColumnName = "projectID") | @ManyToOne | private Project projectID; | what is the synatx to insert = false and update = false... I tried adding it in JoinColumn but still giving me an error. THanks in advacne. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4087384#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...