This is what you get when you don’t truly understand that rent is simply an outrageous tax you pay to a lord to live on his land–a tax, nothing more, that subsidizes a lazy, unproductive aristocracy.
Any refusal to rent to your domestic partner based on a debt is a refusal based upon credit worthiness–an unreasonable refusal.
Just because the law characterizes you as a quasi-landlord doesn’t mean you have to act like a Cheese Ball landlord and rent through airbnb.
World history is a chain reaction of broken promises. You gotta own up and take responsibility.
You should read Rules & Regulations §6.15B and follow the steps provided each time you want to add new roommates.
The landlord cannot increase your rent because you are an original tenant on the lease even if the girlfriend is moving.