Can't become a chef after maxing out mixologist career

Has anyone found a workaround to this like with MC command? For example, you get a sim maxed out in the mixologist career, but then you want them to be in the chef branch. When you quit and try and re join the branch you want the game still won't let you join the other branch! It will let you re join the branch you just left but you can't start over the entire career or join the other branch! Hope this isn't too confusing!