I want to stream a bit of MC, yet I can't migrate my account to Mojang.

I want to migrate my Minecraft account to a Mojang account because if this: http://gyazo.com/b38b64ecaeb046acc69f1f9d1849d2e0
Howevere if I click migrate accoount, it shows this: http://gyazo.com/93427d1c72a4701e7a4f81ca2feff19b
Just for your information, I binded my account with my Twitch account.