Im a landlord. If I can't get my place rented out at the rate I want then I have to lower my rate (hopefully not below my expenses but if so, that's on me)
I have a place that has 2 small 1br appartments next to each other. They make pretty good money rented separately. If they stopped renting for that I would have to lower the rent. If, even after lowering it, I can't rent the place because nobody wants a 1br anymore then I would need to look at combining them to make a larger apartment. Nobody wants to do that, it costs a ton and you get less total rent and lower the "value" of your building on paper...
But if the place can't be rented as 2 1br then you make nothing.... and if 1br aren't renting the value of your building has already fallen. Nobody else wants to pay to switch places with you. Bite the bullet, do what needs to be done to get cash flow back and go from there. Plus enjoy the accumulated tax credits while you are trying to figure it out.