A fact from Marita Camacho Quirós appeared on Wikipedia's Main Page in the Did you know column on 23 July 2021 (check views). The text of the entry was as follows:
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The following is an archived discussion of the DYK nomination of the article below. Please do not modify this page. Subsequent comments should be made on the appropriate discussion page (such as this nomination's talk page, the article's talk page or Wikipedia talk:Did you know), unless there is consensus to re-open the discussion at this page. No further edits should be made to this page.
@Peaceray: Its long enough and the hook is too. All are reffed and no evidence of close paraphrasing but the sources are in Spanish. No image in article but likely there is one taken in a country that allows reuse (e.g USA gov employee). Part of the great work by Peaceray who has identified a good number of centenarian notable women who were Women in Red. My only query is that she is the oldest woman in Costa Rica and there is no ref. 110 would seem young as the oldest man is 121. If it is correct then ALT1 will work. Victuallers (talk) 10:24, 29 June 2021 (UTC)[reply]
The website supercentenarios.net, which is used twice as a reference, appears to have been dead since about 2022. There are archived versions for all sites used, created on the same day given as the access date. However, in one case, the information in that archived version doesn't support what we're saying in the article. In particular, we are lacking a verifiable source that Marita Camacho Quirós is the oldest living Costa Rican. I'm tagging Peaceray, who appears to have seen that website in its original form (judging from the DYK nomination), and who I hope can help find an alternative source. Renerpho (talk) 18:06, 1 December 2024 (UTC)[reply]
@Peaceray: It has been archived, yes; even on the exact day that we give as the access date.[1] I wrote the above talk page comment after adding the archived url to the reference. There's nothing in the archived version that supports our claim. The page doesn't even mention her. Renerpho (talk) 08:20, 2 December 2024 (UTC)[reply]
I was not where I could plumb the depths of web.archive.org yesterday, & I am looking at the incompletely archived pages this morning (PST). It looks like the supercentenarios.net URLs should be marked with {{Permanent dead link<!--incomplete archive at archive.org--> |date=December 2024}}. It is self-evident that there are large swaths of the archived pages that show up as blank, probably because the Internet Archive failed to fully capture the subcomponents of the pages. This is clearly a situation where WP:KDL applies.
We obviously need to keep searching for alternative sources as per WP:MDLI. In the meantime, as the lead for WP:LINKROT states, In general, do not delete cited information solely because the URL to the source does not work any longer.