That's a good question. This is not something that we have encountered before.
I would be very reluctant, but I won't rule it out, to undo a validation. I think that could be seen as circumventing the remedy in the act for a recount. My preference would be to make the information available to the court in a recount so that the judge may take into account those votes and leave the court process to determine that.
There are several guardrails and remedies in our system, and that's a good thing. Obviously, we don't like to see a contested election, so the recount or the validations are the two opportunities to make sure that the right candidate has been elected.