I was able to add fields to my hosted feature service in my dev and stg environments using this tutorial...
https://community.esri.com/groups/survey123/blog/2017/02/01/updating-field-types-in-existing-survey123-surveys
When I attempt to follow the same workflow in my clustered HA environments I get this error...

It would appear that adding a field in a HA environment behaves different. I HAVE had success before so I am not sure why I am getting this USELESS error.
When I check the logs I see this error...
6
I have restarted the PublishingTools GP, I have restarted the HFS. I have restarted the Datastore.
Is there a second way to add fields to a HFS?