In my utility network there are what I can only describe as orphaned associations. ArcGIS Pro (2.9 and 3.0) shows them in the dirty areas table but doesn't show them in the Modify Associations pane. I'd like to just delete them but I'm not seeing how to do that.

When I query the rest endpoint there are results returned. When I try to delete them from the rest endpoint I get an error.

Any ideas on how to clear these?