Unity 300 Health Check Failed

Hello all, I have a Unity 300 on firmware 5.1.1.0.5.005, I'd like to update the firmware but am unable to pass the health check.  The support article tells me to check the hosts page and make sure there is redundancy, our hosts page used to have 2 hosts but they have been deleted, any idea's how to get past this with no hosts?

Error link goes here: Dell EMC Unity: Error Code "flr::check_server_connectivity_2" during Pre-Upgrade Health Checks (User Correctable) | Dell US