Simply removing the speed limit is wrong, you have to update it to current value. If there is no speed limit maxspeed=none is to be set. And if you've driven there on the 2nd of August 2025 there must have been signs, not 80 but 120.
2025-07-30: https://www.mapillary.com/app/?pKey=719373280935570&focus=photo&lat=51.92439206&lng=10.655088279999973&z=18.459682440315458
2025-08-06: https://www.mapillary.com/app/?pKey=804293108936943&focus=photo&lat=51.92439206&lng=10.655088279999973&z=18.459682440315458