How can I move a post?

I just published a post and it went to url: https://www.mysite=78. Instead of the home page. I can only access this =78 from admin, its not accessible from my front page. I tried coping and pasting it into ‘Home’, but it wont publish. Maybe because it’s already published at =78. I should have started at Home, I guess.

Yes, I screwed up, but how can I move the post to “Home” at this point?

Any help would be great.