Ok, you map it for rendering on www.openstreetmap.de/karte but still, not a valid data. Preßburg was the name, but now officially, as you say it is Bratislava. I do get it that people in Germany refer to it as Preßburg but it is old name, and it is tagged as such. I would recommend that for the rendering on  www.openstreetmap.de/karte developers use old_name:de. This is not a single case, I have seen and corrected couple of name:de changes to some names that were used only during occupation in WWII and it was never official name of the place. 