Group of layers in hosted feature layer: one layer in group corrupted. How do I retrieve the data, and understand why this happened?

[KatieStenson1]

A group of 7 layers were loaded as a hosted feature layer for use in Field Maps.

Work was undertaken, when the data was reviewed in ArcGIS Online, 1 of the 7 layers had corrupted.

The geometry was viewable in Web Maps and ArcGIS Pro, but couldn't be interacted with/downloaded/snapped to for digitising. And all record tables in the attribute table were blank.

I have two questions:

1. Any advice on retrieving the data, even if it's just the geometry? I've tried downloading the data from AGOL (export button), loading it to Pro (and exporting), loading it to FME, and no luck. Last resort is to manually digitise the boundaries, as I can load it into Pro but can't snap to it or export it.

2. I have a theory as to why this happened. Whilst the dataset names were all different. I had a point and polygon dataset in the feature layer with the same alias. Could this have cause the corruption if the syncing of data got mixed between the point and polygon dataset? Frustrating if it's the case as it's just the dataset alias, not the dataset name.

Some images attached:

-Viewing the data in Web Map, cannot select polygons and attribute table empty

-'Data Error' when viewing attribute table from item page in AGOL

-'Error' when trying to export data from AGOL

[JakeSkinner]

Hi @KatieStenson1, if you're able to query the service via the REST endpoint, you could try this old tool to download the data.

[KatieStenson1]

Great idea, but sadly didn't work for this issue. Any other ideas are welcome.

[JakeSkinner · Accepted solution]

@KatieStenson1 are you able to query the service by going to the REST URL?  If you'd like, you can share the service to a Group and invite my AGOL account (jskinner_rats).  I could take a look at it.

[KatieStenson1]

Yes I was able to do this, managed to extract the geometry and even attributes from one of the fields, sadly the rest of the fields would not extract, I was just getting an error. But this is the best I was hoping for, thank you for your help.