Upgrade Failure, Restore Failure

I wass attempting to upgrade to the latest Beta of XWiki yesterday and I loaded the WAR file into Tomcat under a new context and everything worked. I then backed up my original context and moved the new install to replace the old install. The system throws exceptions right from the start about a Hibernate index conflict. I removed the new version and replaced the old version. The problem remains. Can anyone suggest a way to recover???? Thanks In Advance, Deven Phillips, CISSP, CCNA Systems Administrator Metal Sales Manufacturing Corp.