Please Help! Can't Place Basement Stairs

I'm trying to expand on a house I have for the family I'm currently playing. I wanted them to have a basement now, so I set one up. Then tried to place the basement stairs. But even with the move objects on cheat, it keeps telling me: "Stairs can not connect with stilt foundation". I cant figure out how to remove the foundation? I'm hoping someone can please help me find a fix for this.

I really dont want to have to demolish the whole house and start all over again!