Skeleton Settings Error

I was attempting to import a skeleton with the same structure as the hero.TPP but found that mine didn’t work and so I had closed it thinking nothing of it but today after coming back to my project all characters using the animation file seem to habe this issue. I do remember a question box popping up in regards to asking if I wanted to change the animation_BP in some form and I had clicked yes thinking I had saved my backup.

I know it’s a rookie mistake but I had forgotten to save my backup before trying out these new mistakes and so this is what I am stuck with for now.

Any help would be appreciated