Yes. You would still need to show an excess was made and needs to be reversed, and there should be a corrective distribution. It would be less than the original contribution.

You amend for a number of reasons, and no one here knows what or how many applies to your taxpayer. That can be for reasons of taking a deduction, for changed AGI or MAGI, for updating basis, form 8606, for penalty, interest, excise tax owed.