Christmas Ibishu Pigeon 1.3

So I got this mod just for the cargo upgrade, as I don't really know why you can't just do this in vanilla. Anyway that works great, it would be neat to add a straps option so you can tie the boxes down.
There is a problem though, your christmas livery breaks my default liveries on the pigeon. The ingame mods manager says the mod is overwriting /vehicles/pigeon/skin.materials.json.

pegeon claus