Comment by borski

It is, but dupes are allowed in some cases:

“Are reposts ok?

If a story has not had significant attention in the last year or so, a small number of reposts is ok. Otherwise we bury reposts as duplicates.”

https://news.ycombinator.com/newsfaq.html

Also, from the guidelines: “Please don't post on HN to ask or tell us something. Send it to [email protected].”