Upgrading the TCA Airgap Appliance is supported after the VMware Telco Cloud Automation 3.0 release. Prior to the VMware Telco Cloud Automation 3.0 release, raw Photon 3 OS OVA was manually deployed and set it up using airgap scripts. The Airgap Appliance created using the latter way, users need to deploy a new TCA Airgap Appliance, migrate the existing data from it, then replace the old one.