Why does the game crash when attach a tuning part to the cars installed later on the game

[cho11]

Hi guys !
I think I discovered something today:
I think there are phrases for modified parts in vehicle models (as in the picture, for example spoiler)
This explains that when I tried to attach spoilers to the cars I installed later on this game, it crashed, they didn't have this phrase.
Only a likely assumption is that correct?

 

[cho11]

ok i solved it. It really was. That phrase is called dummy and it supports activating structures such as wheels, doors, exhaust, and modified parts in the car.
This is why it crashes when you add a modified part to a car that was added to the game later, because it doesn't have a dummy.
Those who didn't know learned.

look also : https://www.zmodeler2.com/docs/program/lessons/advanced/les3_parts.html#:~:text=To create dummy object%2C click,%2C0%2C0) point.