

How do I get these folds out ?
I bought these 7 years ago and while I haven’t worn them all that much over the years (last time was probably two years ago), they are still so comfy and my absolute favorite. I have always kept a shoe tree in them but today as I was packing up my apartment, I pulled them out, and saw that both shoes have this huge fold (?) on them roughly in the same position. If I feel the folds from the inside, it feels like the leather has crumped/crinkled a bit in that spot. What can I do?
(Sorry for the poor description, not sure of the nomenclature, but hopefully the photos are clear enough.)
EDIT: I haven’t worn these in probably two years so it’s not from wear and tear as another commenter suggested. I moved countries around 6 mos back and when I was packing these up, it didn’t look like this. But now that I think about it, it probably had something to do with how I’ve stored them in the closet the past 6 months.