When I go to the unit's menu on the country overview map and try to change the class of a unit to cavalier, not only does it oddly say do you want to change this unit to pikemen, but when I ignore said typo and click okay, it tells me I don't have enough resources to do so, even though got more than enough (about 600 supplies and 425 iron req, got over a k of both). I assume this is a bug of some sort?