How do I change the date of a donation in Its Deductible from one year to another after entering under the incorrect year?

Was entering an item donation for January 2018, but I entered it under 2017 instead.  Its deductible won't let me change the year from 2017 to 2018 under the entry, and I had 20 items in the donation.  Would prefer NOT to have to enter those 20 again.  Just need to change the year of donation from 2017 to 2018.