Several 'standard' JMS tables have composite primary keys. (jms_messages, jms_subscriptions, ..) So: It seems like almost everyone would run into this issue using stndard JBoss. ????? I encountered this problem. When I removed the JMS tables the problem was gone. Alternative might be: temporarilty alter the JMS keys then restore them later. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3995308#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...