fund accounting prepaids

A 2022 December check was issued for a 2023 event in

January 1/20/23

D: prepaid

C: cash

the entire check was not used for the event; therefore the remaning amount was returned to the accounting deparment on 1/25/23

what would be the entry for the returned amount? would we reduce expenses in 2023 or reduce prepaids in 2022