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?