Duplicated resources share UID

[mrjustaguy]

Godot version

v4.0.dev.20211117.official [175690957]

System information

Windows 11, Vulkan, Nvidia Quadro K2000 461.92

Issue description

I created a Standard Material, made changes, and made several duplicates from within Godot's File System (not from Windows) and assigned different textures to each of the duplicates. When restarting the editor, I noticed all the materials suddenly used the same textures, when I looked up the Material .tres files, I've noticed that they all share the same UID

Steps to reproduce

Create a Resource
Create Duplicate of that resource from within Godot
Check UIDs of both

Minimal reproduction project

No response

[akien-mga]

Duplicate of #54774