Can't edit source
Answers
-
We can't edit any sources which are not directly linked to the proper image. Generally what we users are told is that it is not possible to fix indexes unless it's one we can do ourselves. FamilySearch just doesn't have the personnel to do that.
So unless the image gets attached one day instead of having a link to just the full parish register, all you can do is attach the bride and groom sources to their Family Tree profiles, dismiss the notice about unattached records on the source pages for the bride and groom, and put a note on the sources for the bride and groom about the error in the index.
2