Does changing backlink direction penalise “backlinked” website

I am responsible for editing posts on a website and right now am assigned to edit a post which has a backlink to the post of another domain. I was told to fix it, since apparently the wrong post was addressed but I am still not certain about one thing. I was told that losing a backlink does more bad than it initially did good, so would changing the backlink hurt the post redirected to before, or would it even benefit the other post as much, since I was also told that two backlinks from the same domain count less than one from another.