What happened here? Event that gives you a duchy?

[Mods]

So I was just doing nothing as a custom count of gotland when I got this event.
Suddenly I went from a count to being a duke, without doing anything on my part! (no marriages or anything)

Can anyone tell my what this event is and what are the triggers for it? I didn't mod the game at all btw.

 

[ctuncks]

Probably means that your King granted you a Duchy for your loyalty I suppose.

 

[Hootieleece]

No, it is the plot to grant Duchy to another ruler.One AI ruler did it to another and a random count in De jure Duchy is given the title.

 

[FromasterG]

He probably had multiple duchies, so someone in the realm took the "See X Duchy Granted to New Ruler" plot. The plot succeeded, and you were the random choice for redistributing the title.

 

[Mods]

Ah that makes sense I guess, Does it only work if there's a count in the de jure land or would one be created from nothing in that case?