Hello, my eployer was Koplac s.z./Alpdest cee. I can leave you the contacts of CEO and the cartographer (who actually understands how to make changes in OSM). So the CEO is Jan Orava, jan.orava@koplac.cz , and the cartographer is Martina Klocova, email: martina.klocova@gmail.com . Hopefully i was helpful!

Jiri,
Thank you for the question! I was asked to edit openstreetmap data according to the official Southern Moravian cycling portal which provides the original cycling routes, the link to this one can be found here: http://www.cyklo-jizni-morava.cz/5227#directLink=1&e=-582460,-1127200,5&m=itinerary&crl=false&eul=true&r=-579923,-1126763,-589003,-1129690&c=&op=false&rt=false&d=0&sq=0&ds=2&pd=0&tr=1&crn=5227%20(Hr%C3%A1dkov%20-%20Bene%C5%A1ov%20u%20Boskovic)&lcr=5227%20(Hr%C3%A1dkov%20-%20Bene%C5%A1ov%20u%20Boskovic)
However, I did not delete the previously marked route 5227 on the main road, because this was also a question for me and I have informed my employer about this in my reporting. This is the current solution from our (their) side. It should be corrected in the coming months, but as I do not work there anymore as of last week, I cannot be sure when this happens.