Cant publish extension. "Duplicate add-on ID found"

I’ve been trying to publish my chrome extension to firefox by having the chrome store foxified extension “convert it”. It worked the first time but due to unrelated issues i had to create a new extension and try again. Now i’m getting the error “Duplicate add-on ID found” when i upload it. I even changed my mozilla api credentials and it still wont work. What should i do?

It’s likely your first submission is still around. What’s the ID?