I have a point layer with a related table that I published from ArcGIS Pro to ArcGIS Online. I now need to add a field to the standalone related table. When I go to the table's Overview page, then the data tab, the add field button which is usually there is missing. I have gone around and around and can't seem to figure out why this is. I am trying very hard not to reupload the data from Pro since I now have associated dashboards and maps from the data and that woudl (to my understanding) change the feature service ID (and break all those connections).
I am pulling my hair out on this one. Any advice is appreciated. Thank you.