Random texture on car spawn

[Kkoops]

Hi,

I currently have a problem with several vehicles (of the same pack).
When I spawn it, sometimes they have the right skin (LSPD), but sometimes they just have a random color.
So I would like to know if it was possible to force the vehicle to spawn only with the police texture and without any particular color?

I already look in files like carvariations or vehicles.meta, but I can't find the solution.
Any idea?