Hello,
I have a feature service that I am trying to add a new field too, but at the moment I am being blocked from updating the schema because of a joined view feature service that is using my target feature service.
When I investigate the REST End Point page, I can see a view listed:


However, when I try to click on it to see its details I am met with this:

This joined view is also no where in my ArcGIS Online organization and using the gis.content.search function for the API for Python does not return any hits either.
How can I go about deleting this 'ghost' joined service so that I can update the schema of my target feature service. I would really like to avoid having to recreate this service.