I read that post, but even if you remove the primary key constraint on the "ID_" column, it is still labeled an Identity column that is auto-incrementing. This still fails on insert. I do not want to remove the auto-increment feature because that seems dangerous. I may just try writing a custom hibernate generator class because as it stands now, this seems a bit "buggy" and I would rather control it then change up the entire table structure (which may cause other problems down the line) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4038408#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...