Would it also be ok to upload the web build to a new public game page and put that link at the top of the description. That way the original can remain a web version too.
i.e. "This is the original submitted version of the game" which links to a game page with the submitted web build.
Viewing post in Updating the game - question
@Flyce_9998 if there was a technical issue during exporting preventing your game to be played, you can submit the fix (just point out it is the original submission, just with that technical fix). You can do this on the same game page.
@SaitoInteractive Just make sure there's a way to play the original submission from the game page you submitted as part of the challenge; it can be a link to an external website or a link to another itch.io page (although that second option might get confusing for the reviewers)