What happened was:
- The nomad pechnegs conquered some of land in russia
- Eventually they settled as Feudal in the county of Oleshye
- The titular (and feudal) khanate of Oleshye forms.
- Their russian vassals revolt for independence
- I use the invasion of Wallachia CB
- The former khan of oleshye is reduced to a count
- The titular kingdom of oleshye is now called k_dyn_194386 and everyone related to the former king is now prince/princess of k_dyn_194386
- Today i loaded the save again (with the non-beta 2.4.2) and the titular kingdom no longer exists.