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Append in hosted feature layer caused loss of data

Question asked by kfran@enstruct on Jan 31, 2018
Latest reply on Apr 30, 2018 by KGerrow-esristaff

There is a hosted feature layer with 7559 points in AGOL. We created 1000 more and wanted to append them to the hosted feature layer. The schema was a perfect match as it was downloaded from the same feature layer that was to be updated.

 Append screenshot 1

I used the new Update data functionality for hosted feature layers. 

Append screenshot 2

When i applied the updates all previous points were deleted and i could see only the new ones.

Why could this happen?

Is there any way to retrieve the old points?

the Service URL is:

https://services8.arcgis.com/WviT8ecuvqxI4l6m/arcgis/rest/services/freatydrom04/FeatureServer/0?token=tzy3UIJMmsmeJAeZwn… 

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