remove query string from product filter

Hi! I am using WBW product filter. When i select something from filter, the url has query string. For eg. I got this url when i use filter

https://houseofchessstore.com/product-category/chess-boards/?wpf_filter_wood-combination=blood-wood-maple-wood

And i want this as : https://houseofchessstore.com/product-category/chess-boards/blood-wood-maple-wood

Kindly help

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