Updated November 3rd, 2016
The Serv-U installation utility is designed to seamlessly upgrade users from older releases of Serv-U to the latest release with no excessive downtime or reconfiguration required - simply install and go. However, due to table name changes in Serv-U 184.108.40.206 made to avoid conflict with reserved keywords in Microsoft SQL Server (which could occur when ANSI quoted identifiers were NOT used), upgrades from Serv-U 6.x or previous which include databases require slight modifications prior to upgrade.
The Serv-U upgrade requires only two small adjustments to the Serv-U configuration files and to the database that will be upgraded.
Within the Serv-U Administrator, two adjustments must be made. These adjustments guarantee that the table names match new values for Serv-U 9 and later.
Within the database, two adjustments must be made to match the above changes. These changes guarantee that the table names in the database match the table names configured in Serv-U.
Our Serv-U Database Integration Guide (PDF) contains complete information about the process of setting up a third-party database with Serv-U.