Hello !
As the title says, I tried the Guestbook feature with a file I added to a dataset. This guestbook looks like this:

As you can see, there are a lot of required fields. But it seems that required fields are not that much "required", because I can download the file of my dataset without filling the fields. The dataverse version used is 4.8.4 .
If you have a dataverse testing environnement available (I don't have any link left), I would be happy to reproduce it.
@rmo-cdsp hi, thanks for the bug report. I believe this was fixed in 4.8.5 in pull request #4404. There's some discussion in #4393 and in the release notes at https://github.com/IQSS/dataverse/releases/tag/v4.8.5
Thanks @pdurbin. I'm closing this as a duplicate, @rmo-cdsp feel free to reopen if you feel this is incorrect.
(realized I forgot to close this :) )