Three Tactics from the Buddha to Forgive without Feeling Defeated.

When you forgive someone who has wronged you, it doesn’t erase that person’s karma in having done wrong. This is why some think that forgiveness has no place in the karmic universe of the Buddha’s teachings, and that it’s incompatible with the practice of what he taught. But that’s not so. Forgiveness may not be able to undo old bad karma, but it can prevent new bad karma from being done. This is especially true with the bad karma that in Pali is called vera. Vera is often translated as “hostility,” “animosity,” or “antagonism,” but it is a particular instance of these attitudes: the vengeful animosity that wants to get back at someone for perceived wrongs. This attitude is what has no place in Buddhist practice. Forgiveness is what clears it out of the way.

https://tricycle.org/trikedaily/three-tactics-forgive-without-defeat/