v17.1 should automatically upgrade production release v15.2 deployments. Shut down your server, backup your database, install 17.1, and restart Tomcat. The system will automatically update the schemas and data to the new version.

Detailed upgrade instructions: https://www.labkey.org/Documentation/wiki-page.view?name=upgrade

Upgrade support information: https://www.labkey.org/Documentation/wiki-page.view?name=upgradeSupportPolicy

Adam