Merge trees and mistakes

I made a mistake. During resolving duplicates I by mistake instead merging to persons as one, made this duplicate as a partner of the person she should be merged with. So now my grandpa has a wife Emilia Chojnowska family name Jamroga. And this Emilia has got a partner - Emilia. I can't merge them and I can't remove one Emilia. I removed all relatives trying to remove one Emilia, I changed her marital status and surnames, but it didn't changed my possibility to remove her as a partner or merge with Emilia Chojnowska as a one person. I will be grateful for helping me solving this problem. What is worse I'm afraid I've spoiled date in others family trees.