Solution applies to: NavVis IVION 10.0.0
I upgraded my instance to NavVis IVION. Why do I see unassigned datasets?
Unassigned datasets are datasets that were unloaded from your IndoorViewer instance at the time of the update to NavVis IVION. Therefore, the automatic migration could not allocate these datasets to sites.
If you have unassigned datasets, you can assign them to your sites using the Assign them to a site now link as shown in this example screenshot.