The entity "Region" can't be added as the location property of a relation.

[8hur]

Description

When adding a relation between, say, an intrusion set and a sector, the location property can be filled with a country. However, the "region" entity can't be added.

Environment

Demo website, ANSSI on-premise.

Reproducible Steps

1. In any report, on the observable tab, add a intrusion set entity and a sectors entity.
2. Add a "targets" link between the two.
3. Try to add a region (e.g. Europe).

Expected Output

Same as a country, the region location gets added.

Actual Output

A region entity can't be selected. If added after the link has been created, the region location isn't saved.