FamilySearch is allowing the editing of some index entries in their online indexes to record images. It’s a great way to correct indexing errors that can easily be made. That’s a good thing. It makes it easier for users to find their person in the database index.
According to a blog post on the FamilySearch site index editing can be done when the original is wrong.
Nope. Correcting an index entry to reflect what is written in the actual record is one thing. “Fixing” the original record is not.