Ok I found it, this was also mapped here 2 years ago, it was deleted and now you basically restored it: https://www.openstreetmap.org/changeset/123333164

It's for some "investigation" but I can't really figure out what's going on exactly.

This is definitely not an actual, existing restaurant, so I will revert this. OpenStreetMap is not for adding these kind of non-existent features, please save coordinates of places like hit somewhere else.