Ok, I'll try to help you one more time but its hard when you don't help yourself. But if you are struggling with the basics I suggest getting a book about Seam and Hibernate/JPA You do picture.setQuestion(question); therefore your picture class (which you say is an entity) has a reference to question. So, when you persist picture, it will have a reference to question, which must be marked @Transient. Is it? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4100281#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...