Fixed Soul

Story
Sans was trying everything to fix Chara's Soul since the events of Shattered SOUL happened then he got DT, toriel's pie, a knife, toriel because she has fire Magic, the six human Souls, Blaze and a bit of blood and monster dust and he gave a tear from him and then did a ritual I'm not going to say worlds they chanted because I don't know anything about rituals. And then after it was completed Chara's Soul is fixed everyone was happy especially Sans he was crying tears of joy and then everything went back to normal except Sans is now protecting Chara from Mostly everything just to be safe it will never happen again.

Information
This will not happen in Shattered SOUL since there is no way to stop the events from happening which means sadly there's no cure for it.