change the citation of preprint version into journal version of article In my article, I have cited a preprint version (arXiv) of one references. After my article has been published in the final form, I received a request from the author of the preprint article asking me to make Corrigendum that tells the readers about the journal version of his cited article. I am new in the publication field and I want to know whether I should obey to his demand and make the corrigendum or leave the citation as it is.
I might mention that the contents of both preprint and journal versions are similar and the version that I have read and referred to in my manuscript is the preprint as the journal version was not available at the time I wrote the paper.
Thank you for your advise.
Is there a major difference (a grave mistake or something) in the journal version? Apparently not.

Is there a grave mistake in your paper that you cite a preprint? I don't think so.

You also cite the version you were working with, which is Ok and a right thing to do.

I'd correct the reference in my database for the future use (and obtain the journal version, of course), but I won't bother with corrigenda. They are for bigger mistakes than just a wrong version of a reference.