What Orphan Remote Bindings? How it is created?

I was reading the PTC article "Remotely Bound Properties (Tags) on specific Industrial Things are not getting any updates from KEPServerEX / ThingWorx Kepware Server"

It mentioned Orphan Remote Bindings on the IndustrialThing.

What it means or how it is created?

I believe it is something similar to ghost entities.

Please let me know if any further information available.