My mind is blown.i hate how when people bring concerns / bugs / suggestions to the forums, people redirect them to entering in code and doing all kinds of other crap as a workaround. why can't the game just work is the point. no one enjoys going on a forum to get a workaround to a game that's such a time-hole
Nonetheless, open your savegame with textpad or something and search for the name of the province. Once you find it, look for something like:
Code:
building_construction=
{
start_date="1492.10.12"
date="1493.10.12"
building=2
}