Cant change vampire skin tone/skin color

It is not possible, in both create a sim and the edit sim mode, to change the skin tone of a vampire. I wanted to change Vlad’s face, and i could select a premade face, but couldn’t change the skin tone. The same goes for a vampire sim in create a sim.

Edit: in the screenshots you can see the difference between the 'regular' sim, which gives the opportunity to change skintone, and of both vampires, which doesn't give that option.

Edit2: I can change the skin tone of a vampire when I want to create a new one via the body options. I cannot however change the skin tone of Vlad, a preexsisting Sim, for example.