Problem in Crusades - campaing

I have noticed a problem while playing Crusades campaing in Kingdoms...
Either i have missed something or im just dumb :embarassed:
But i can´t find a way to reinforce Constable of Jerusalem or Marshall of Templars units... They´re unique thou...
Tried visiting them in Jerusalem and waiting few turns...

you can't retrain them.

Try retraining them in Kerak - Lusted said you have to have a certain level barracks/stables to retrain them

Ok... going to give it a try soon.