Judging by the Demo, Krakow province still has a core of KRA from the very beginning. As anyone could learn from Wikipedia, Republic of Krakow was only established in 1815 and it is highly unlikely something like it could ever revolt out of Poland or be released in a peace deal.
Therefore, I think that "add_core = KRA" should be moved from the beginning of "262 - Krakow.txt" to 1815.5.3, when KRA becomes the owner and controller of the province.
Therefore, I think that "add_core = KRA" should be moved from the beginning of "262 - Krakow.txt" to 1815.5.3, when KRA becomes the owner and controller of the province.