A simple character flip in a single letter would make the key unusable. ocr is fairly good, but it's not uncommon that you get a handful of errors. That's usual

A simple character flip in a single letter would make the key unusable. ocr is fairly good, but it's not uncommon that you get a handful of errors. That's usually fine if the result is meant for humans, but here, 99.9% correct is not enough, you need 100% correctness.