During the link conversion from archive.is to web.archive.org, the archived date is changed to 2016-03-xx for some reason. If the bot compares the archived contents, then it's fine, but if not, the archived date should be close to the original one.
By the way, archive.is has a "long link" variant (see example in the first entry below), so maybe update the link to it, instead of changing to web.archive.org?

Was: http://archive.is/uKMKt
Long link: http://archive.today/2014.05.20-223021/http://www.litcentrum.sk/rozhovory/veda-vydavatelstvo-slovenskej-akademie-vied
Was: 2014-05-20
Now is: https://web.archive.org/web/20160306141550/http://www.litcentrum.sk/rozhovory/veda-vydavatelstvo-slovenskej-akademie-vied
Now is: 2016-03-06
Diff: https://pl.wikipedia.org/w/index.php?title=VEDA,_vydavate%C4%BEstvo_Slovenskej_akad%C3%A9mie_vied&oldid=63262495&diff=cur

Was: https://archive.is/njbcf
Was: 2013-04-28
Now is: https://web.archive.org/web/20160304061921/http://euro.e15.cz/archiv/report/sen-o-svetove-it-firme-778351
Now is: 2016-03-04
Diff: https://pl.wikipedia.org/w/index.php?title=Zoner_Photo_Studio&diff=prev&oldid=63323021&diffmode=source