Add new Zombies.

[trenzasrojas]

Good evening, I would need some of your help, I have downloaded a mod to add new types of zombies to add to my pois.
In the prefab editor, when I want to add them to a sleeper volume, they don't appear, but instead if I press f6, they do appear.
 I don't know if I'm doing something wrong or if I have to do something else. A little help please.
Thank you so much

Edited August 1, 2023 by trenzasrojas (see edit history)