Hi,

Unfortunately you've mapped a new tertiary road, node for node, on top of a previously existing service way. The proper way to map ways of a different class which were there before is to cut up the ways that need a different classing and change the tagging, so highway=service > tertiary. In short, you need to remove the tertiary ways you mapped on top of the existing ways and reclass the old to the new status. We do not delete old roads when they get up or downgraded and map a new one... that will result in the loss of now and way history.

Let me know if you need help.

cheers

PS: In case you dont read english, go to DeepL at https://www.deepl.com/en/translator#en/it/