This is something that's been happening to me for years. In the grand scheme of writing, I've worked with ideas that Just Don't Work.
I shelved a short story idea today. Or at least partially. I'm not going to use the idea at all. I have enough ideas for right now. And I can't even use all of those at the moment.
So fow now, I'm rewriting backstory. And working on Long Ridge. And trying to finish a novel or two.