I log to different xbox account and switch back, now i can't play java because my username is already taken

I log to different xbox account and switch back, now i can't play java because my username is already taken

What I expected to happen was...:
i click play and it loads up

What actually happened was...:
it said "enter a username" and when i did it said taken. My own profile cant be used.

Steps to Reproduce:
1. switch xbox account
2. switch back
3. load minecraft