(don't) cry over spilled milk
Meanings of "(don't) cry over spilled ..."
To show regret, or dwell remorsefully on the past. To complain about losses, or faults that cannot be changed. There is no resolution just as crying will not put the milk back in the glass.
get upset over something that has happened and cannot be changed.
Pagiging malungkot o masama ang loob sa isang bagay na nangyari na hindi na maaring maayos o mabago.
Jetzt ist das Kind schon in den Brunnen gefallen.
потерянного не воротишь