2024 or 2025 Tax Records question

Purchased a Breast pump for pregnant wife in 2024. Our Medical Insurance company issued a reimbursement check on 12/24/2024. 

Deposited Medical Insurance Reimbursement check into our Joint checking account in January of 2025.

Should I keep records under my 2024 Tax records as a 2024 transaction or under my 2025 Tax records as 2025 transaction for a 2024 event/reimbursed medical expense?

 

Thank you