The 'donau' label is wrong. There is a different town in Bavaria where 'Gundelfingen Donau' would be appropriate. 
Applies here:
https://www.openstreetmap.org/way/30445270
https://www.openstreetmap.org/way/30447186
https://www.openstreetmap.org/way/42700905
https://www.openstreetmap.org/way/30447999
https://www.openstreetmap.org/way/29411563