I have a duchy (Grand Principality of Smolensk) and 2 counties belong to me while 3 other counties to my vassals. Because I have too many duchies I was going to give one of the counties to a good ruler from my dynasty, and next grant him duchy.
This worked well in the past, but not now. After granting a county, the "Grand Landed Title" option is greyed out, the reason is I don't have a landed title which I could grant to this person.
At the same time, I can grand this duchy to one of existing counts…
Why? Is this a new game restriction?
Best Answer
Gavelkind Succession has some mechanics to avoid you giving your heir all your titles except one before you die, so you can't game the system.
https://ck2.paradoxwikis.com/Gavelkind
But it seems like you are not trying to give your heir a title, but another character. Does the character in question have any traits disqualifying them? is the duchy a regular feudal duchy?