As customer use SCSP / SDCS:SA they may retire older servers and or upgrade them to newer OS. When you install additional SCSP management servers the tomcat only install sets a registry key that stops the install from modifying the database. If the customer has retired the first server then they will need to remove the registry key so that when they upgrade the server binaries the database Schema is updated as well.
Here is the registry key and the value:
Set TomcatOnlyInstall to False. This will trigger the DB Upgrade (REG_SZ type)