I don't think anybody can tell you what's going to happen as it depends on who is looking at the reservation and whether they know/care.

Hotel sales/inventory department instituted a minimum stay. They may/may not be reviewing future bookings.

Front desk personnel who checks you in may/may not be aware of minimum stay and/or they may/may not care what sales has instituted.

What another property does in this scenario may/may not be what this property will do.