回複：指紋已經過期。下個月我的CASE就Current了。我可不可以主動詢問要不要再做一次指紋？

You had better wait for the USCIS RFE for the fingerprinting. They will process your I-485 case when the PD is current even if you think 指紋已經過期. If USCIS think they need you to do it again, they will inform you.