You must update your custom repository to contain New Cloudera Data Warehouse
images when available before you upgrade your Virtual Warehouse or Database Catalog. The
Virtual Warehouse UI indicates when an upgrade is available. If the new images are not
available in your custom repository the upgrade fails. Currently there is no rollback
option available. If all required images for the new version of a Virtual
Warehouse or Database catalog are not in the repository, CDW falls back to a
previous version. You can then create a Virtual Warehouse based on the earlier
version of CDW.