Client ruler keeps spawning in Dalminion

I'm playing Rome, it's around 220 BC and I've had Dalminion as an Allied State for years.

For some years now there's been spawned a new client ruler every single turn, even though I got one in the city. I tried solving it by building a Type 2 government and moving in a family member, but they still keep coming. Not too much of a problem since I can just sail them to sea and wait for the pirates, but damn, the upkeep can create some problems. Right now I have like 4 of them on a ship and 3 waiting to get on another one.

This sounds quite unique. Have you tried letting the city rebel and re-conquering it?

No, been at work for the last 2 weeks, but that is what I was thinking. Try it when I get home tomorrow.