Regular townies turning into spellcasters?

I don't mind having spellcasters in my saves but I don't like having the pre-made townies becoming spellcasters because even though they don't autonomously practice magic outside the realm, they will have the occult status and I have my MCC settings set so that my townies get married and have children, it's annoying when Bob and Eliza suddenly have a spellcaster child and I can't change them back to normal sims because Sims 4 doesn't allow me to change a sim from an occult into a normal sim in CAS .__. I hope that when MCC eventually gets updated with ROM it will bring some sort of solution to this :/