The wrong mesh is pasted when copying and pasting a Rig with bones and identical mesh layer names

How to reproduce:
1. Open the attached “RigCopyPasteBug.zip“ project
2. Select the “Model“ asset
3. Open the “Sprite Editor” and select the “Skinning Editor”
4. Press “Copy Rig“
5. Select the “Model copy“ and repeat step 3
6. Select “Paste Rig“ and Press “Paste“

Expected result: The Rig is pasted correctly
Actual result: Another “head“ mesh of the Sprite appears

Reproducible with: 6.0.6 (2021.3.5f1), 6.0.7 (2021.3.30f1), 8.0.2 (2022.3.10f1), 9.0.1 (2023.1.14f1, 2023.2.0b10, 2023.3.0a6)

Reproducible on: macOS 13.4.1 Ventura (Intel)
Not reproducible on: No other environment tested