After upgrading JIRA.. I went to Applications and upgraded Service Desk.
and now I have this error message.
2017-10-19 16:44:56,098 JIRA-Bootstrap ERROR [c.a.s.b.lifecycle.server.ServerPluginLifeCycle] '2.5.9' version of Service Desk cannot be upgraded to '3.8.2-REL-0016'. Upgrade to '3.0.0' <= <version> < '3.2.0' first.