You can complete an upgrade on an existing server instance.
(For upgrades from 5.2.0) This upgrade scenario assumes you are upgrading Content Platform Engine on the application server where it is currently deployed and making configuration changes to that deployment.
(For upgrades from 4.5.1, 5.0.0, or 5.1.0) This upgrade scenario assumes you are upgrading Content Engine on the application server where it is currently deployed and making configuration changes to that deployment to include Process Engine information.
A server that was formerly a Process Engine server could also be used
to install Content Platform Engine and Case Analyzer. This requires an installation
of the same application server software that is installed on the other Content Platform Engine servers. Handle the
configuration of this server like an upgrade with migration to a new
server instance. Then add the new server as another node in the Content Platform Engine application server
cluster.