I think this is the best solution. It maps the actual de-facto situation which is more important than what is the situation on paper but also pays tribute to remark what the actual legal situation is.
I’d add: parking:both=no even though cars are parked to not have parking software (in the future) suggest that one could park there but at the same time also add a parking:note, explaining that in fact, cars are parked here, but it is not legal.