The format of database tables used by the historical data service has changed in version 12.3.0.0.0 or later to save space in the database.
Under most circumstances, the upgrade process automatically converts the database to the new format. If this portion of the upgrade is not successful, an error message is displayed on the command line and in the /var/opt/sun/xvm/update-saved-state/update_EC_minor_bundle_12.3.x.<build number>/updatelog.txt
file, and you must update the database manually.