Report server database is not configured (Upgrade Advisor)
Upgrade is blocked due to an incomplete report server configuration. The report server database is not configured.
Applies to: Reporting Services Native mode | Reporting Services SharePoint mode.
Setup can only upgrade a fully configured report server instance. To continue, you must either configure the report server database, or use Microsoft Windows Control Panel to remove the report server feature from the SQL Server installation. After you remove Reporting Services, you can upgrade other SQL Server components.
If you did not configure the report server database, the report server is not operational and should be removed prior to upgrade.
For additional information on uninstalling Reporting Services , see Uninstall Reporting Services 2012. the topic describes how to uninstall a specific version and the procedures are similar for previous versions as well.