Hi, hard to say what goes wrong. The only possible problem I saw: the field "dealerNo" does not contain a @Column annotation: private int dealerNo; So maybe this field is not set synchronized with the database, so that your "getDealer" method does not find anything and the client creates a new entity? If this does not help: please post the code snippet of your client. It might also help to activate SQL logging in persistence.xml and take a look at the SQL statements. You should find an insert statement instead of an update there. Hope this helps Wolfgang View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4212602#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...