Best practice for correcting an AP check reversed in the wrong period

A Customer cut a check in December and then reversed it, but reversed it to the current date of January in error. What is the best way to fix this? The check should never have been cut so the invoice should still be open in December (at year end).

Thanks,

Sue

P.S. None of the 'Processing' subcategories appear to work so I put this in a different category just to get it posted.