When you install DCS management servers the it will either be the primary or a tomcat only install. The tomcat only install sets a registry key that stops the install from modifying the database.
If you intend to make a new server the primary, you will need to set it's tomcat only registry key to false, and then the tomcat only to true on the other DCS managers.
All Versions of any of the following Products (DCS, CSP)
Data Center Security Server
Data Center Security Server Advanced
Data Center Security Server Monitoring Edition
Critical System Protection
Here is the registry key and the value:
Set TomcatOnlyInstall to False. This will trigger the DB Upgrade (REG_SZ type)