Hello Misaki
Well, the main difference is that my PSD contains more than 150 layers and multiple [slot] and [merge] folders in a single [folder] folder. (your .ZIP is empty)
What efficient advice would you give me if, after importing into Spine, I want to update or add some photoshop layers (in [slot]) and re-import them with the script? Should I export all layers again and only import changes/new into Spine?