We are seeing this Msg in GIS Server log
type='INFO3' code='17002' target='xx/xx.MapServer' methodName='GraphicFeatureLayer.Update' machine='xx-xx' user='arcgismanager' process='7488' thread='5296'>Invalid Spatial Reference in the input for the operation on Layer: ..xx. Using Map's Spatial Reference.</Msg>
This happening from editable feature service layer in a web map written in ArcGIS JavaScript API
Any help is highly appreciated, thanks.