please check the map data or get yourselves familiar with OpenStreetMap before creating a note. The roundabout is in the map since 8 years. It is tagged as mini roundabout because the middle island is driveable. This is how we tag it in OSM. The rendering in the map may look inferior, but that's not out problem.
https://www.openstreetmap.org/node/296144722/
https://wiki.openstreetmap.org/wiki/DE:Tag:highway=mini%20roundabout?uselang=de