Modding Help i wanna add npcs to 2stoptele's spawnpool but they won't despawn

i made the file

Code:

folder\objects\outpost\2stopteleshop\2stoptele.object.patch

the code is

Code:

[{"op": "add","path": "/npctypes/-","value": {"type": "villager","species": ["apex", "avian", "floran", "glitch", "human", "hylotl", "novakid"]}}]

and now the villagers won't despawn, how to make them despawn?