I use reverse geotagging enable in this hierarchy:
Places/Country/State/City.

When I press "apply reverse geotagging" then digikam adds 3 different tags, i.e. Places/Belgium, Places/Belgium/Brussels-Capital, Places/Belgium/Brussels-Capital/Ville de Bruxelles.

I would expect digikam to add only the leaf tag, i.e. Places/Belgium/Brussels-Capital/Ville de Bruxelles

Reproducible: Always

Steps to Reproduce:
1. Go to the geolocation page
2. Geo-tag a photo in a city (e.g. Bruxelles)
3. Add an hierarchy Places/{Country}/{State}/{City}
4. Click on "apply reverse geocoding"
Actual Results:  
The photo is populated by more than one location tags

Expected Results:  
There should be just one (leaf) tag added to the photo