[Solved] How to import updated PSB file without re-linking all the sprites in Sprite Library Asset?

I use PSD Importer to import a PSB file into Unity. I want to make the body parts of a character swappable, so I use Sprite Library and Sprite Resolver to change the sprite for each body part. In the Sprite Library Asset, I link the sprites from the PSB file for each category that can be swapped for each body part.

But the problem is, if I update anything in the After Effect software and export as a PSB file, then import the PSB file into Unity, it will become a new PSB asset in Unity, then I will need to link all the sprites again from the imported PSB file for each category in the Sprite Library Asset.

I plan to use C# script to automatically set up the sprites for each category in the Sprite Library Asset instead of manually linking the sprites one by one. I try to use SpriteAtlas so that I can use GetSprite() to automatically get the sprite by name in a new PSB file, but I cannot link the atlas file (the file that contains all the sprites) in the PSB file to the SpriteAtlas.

How could I access the sprites in the PSB file in C# script?
Or, is there a better solution to solve the above-mentioned problem so that I do not need to link all the sprites again in the the Sprite Library Asset whenever I re-import an updated PSB file into Unity?

Thank you.

 

I thought that I have tried the solution before asking this question but actually I have not yet tried the solution.

The solution is just to REPLACE the existing PSB file with a new PSB file in Unity and the sprites that match will still remain in the Sprite Library Asset.

Thanks.