Upgrading to 6.0.0.0 is only supported from 5.3.6.0 or later. If you are running a version older than 5.3.6.0, you must first upgrade to 5.3.6.0 or later before upgrading to 6.0.0.0. For customers running on a release earlier than 6.0.0.0 and needing to upgrade to 6.0.0.0 or higher, please contact Delphix support to help coordinate this upgrade.
If you are upgrading from a version < 6.0.0.0 before you begin the upgrade process, contact Delphix Support to perform some pre-checks.