I make peace with each of my mistakes, because they are in the past.

The past is finished, which is not the same as gone. It's fixed — nothing further can happen there. The only thing still capable of moving is your relationship to it.

Which is why a sentence you said in 2019 can arrive at two in the morning carrying its full original voltage. The event is long over. The current is coming from now.

Making peace is less about forgiving and more about updating. That person had the information they had at the time. You've since learned the thing that makes it all look obvious.