Assets catalog .webp warrning

When I enter webp image to the assets catalog I get warrning: /Users/..../Assets.xcassets The image set "Card-Back" references a file "Card-Back.webp", but that file does not have a valid extension.

It works, I see all my images perfect. How can I fix the 200+ warrnings?

Assets catalog .webp warrning
 
 
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