There is a memory reconsolidation technique in the book Embrace The Unlovable by Amyra Mah (a book recommended by PJEby a long time ago) that does exactly that :
I find this very effective. More effective than the way it's done in IFS, because you keep alternating between activating the schema and "mismatching it with love", so it really forces the brain to update.
The only difficult part for someone who's not used to things like Metta meditation is to actually create the feeling of love. She has other exercices in the book to train on that particular aspect. I wouldn't recommend reading the whole thing though as there is a lot of non-sense outside of that particular technique.