When your bot finds an archived link (link beginning with https://web.archive.org), please fill in "nee" for the parameter "dodeurl". Your bot does this many times wrong. Filling in "ja" instead of "nee" every once in a while is no big deal, but filling in "nee" constantly is.
You use "nee" as a default, but you should use "ja" as a default.
@Smile4ever I'm actually more confused after your answer. I would imagine 'nee' (no) should be the default, when an archived link is present, but the link still works properly? Then, if a link is reported as 'dead', it should change to 'ja' (yes)?
PREVENTIVE + ORIGINAL LINK IS ALIVE OR DEAD
If you add an archived link with the parameter "archiveurl" as a preventive measure (=the link is still up, but we add the archived link for use in the future), dodeurl should be "nee" because the original URL isn't dead.
NOT PREVENTIVE: ORIGINAL LINK IS DEAD (archive.org link found in plain reference or url parameter of cite template)
Currently, plain references including archive.org and cite templates including archive.org in the url parameter, should default to dodeurl=ja because 99,99% of the archived links in the Dutch Wikipedias is there because the original URL is dead.
When you find an archive.org link which is not in the archiefurl parameter, dodeurl should default to "yes" (because we assume the original URL is dead).
So if you start adding archive URLs to references as a preventive measure, please refer to this explanation and use dodeurl=nee when the original link is still up. (and default to dodeurl=ja in all other cases).