Multiple objects with same id

Questions
1

In my scene, I have multiple object with same id(176)

one of that is mesh which I added, and other one is child of transformControls.

is object.id is unique or not?

2

Yes, Object3D.id should be unique (source.) One exception I can imagine is if your main app and transform controls module would use separate instances of three (imported from different places.)

Could you share your code / jsfiddle / codepen replicating the issue?

3

Thanks!

You are right.
by my mistake both use different three.module.js module.