I wrote a blog post a while ago and gave it a random title and url and planned to use it as filler content that I dont care if it ranks or not. However, I only now just found a perfect keyword for this article. The problem is that the blog post is indexed, with a completely irrelevant title and url from this keyword. I do not want to write a new article when this one is perfect for this keyword. So, I am wondering: Would rebranding the entire article by changing the url and title be okay? I've never rebranded a post before and don't know if google would re-rank it under for its new title and keyword or penalize it or something.