Help needed!

I'm trying to change the relationship in cas, I have cheats on..

Ps5 no mods/cc

Problem is, it won't let me. Look at the image

This is the "father" and his two daughters are older than him some how haha! I just want them to be house members

Ive saved/restarted etc, tried it in game play and in manage house holds

Hope someone can shed a light on this xx