I tried to create a prefab from another prefab, but forgot to "Break Prefab Instance" before dropping the instance on the new prefab. Now collisions are no longer detected, updates to the prefabs are no long showing up in the game (whether I update the prefab directly, or create an instance, break, edit and apply changes). It's effected a couple different objects. I've tried creating new ones from scratch with the same problems. I've insured the tags are all correct. I've spent days trying to get it to work normally again. Is there a fix or do I need to completely scratch the project and start again? Thanks in advance.