You can only upgrade a database if the schema repository contains a new, checked-in version of that database's schema. You cannot use this wizard to associate a different schema with the database.
Along with each database, this wizard lists the basic information about the database, including its name, current schema version, physical location, and additional comments.
Select the database you want to upgrade and click Next to proceed with upgrading that database. You can only upgrade one database at a time using this wizard.