“You” require a continuous analysis of cash flow to continuously determine value, and proper management. A simple, and common, requirement in commercial lending called the debt service coverage ratio.

https://www.investopedia.com/terms/d/dscr.asp

Lower income for the building means lower numerator, which means being unable to meet the agreed upon DSCR, which means default. Whether or not the lender acts on this default is a separate matter, as they are usually loathe to get into the property management business, but renegotiation of terms and eventually foreclosure does happen.