I am trying to move Zimbra 4.5.6 to a different server and running into some difficulty. I am following the instructions as detailed in Moving ZCS to Another Server » Zimbra :: Blog and having problems with the last step which is running the installer for the final time. The installer goes through its process but at the end throws an error that I cannot find anymore detail on. Here is a clip from the end of the log:

Restoring existing configuration file from /opt/zimbra/.saveconfig/config.save...Restoring backup schedule...done
Operations logged to /tmp/zmsetup.log.13182
Checking ldap status
Starting ldap
Setting defaults...Done
Setting defaults from existing config...Upgrading from to 4.5.6_GA_1044
Stopping zimbra services
Verifying /opt/zimbra/conf/my.cnf
Starting mysql
Starting logger mysql
Wed Jul 2 17:46:35 2008: SELECT value FROM config WHERE name = 'db.version'
I can't upgrade version

UPGRADE FAILED - exiting