Changing fandom

I know someone can add bias when buying PRO. But can I change my fandom? At the beginning it asked me about my bias and it got me in the fandom of him as a soloist. But I would like to change the fandom so I get the MONBEBE. Wonho is still my ult but he is a former member. Please is someone can help me to know if it's possible to change fandom 🙏