Pricing rule is not applying on old imported products

In starting I set pricing rule and imported some products. And all products price saved according to correct pricing rule in my woo store. But after few days i changed in pricing rule and saved it, But new pricing rule in not applying on old imported products in my woocommerese its only work on new upcoming importing products.
This is very basic and very important section for dropship but if pricing rule will not work properly then its how can do drop shipping properly. Please fix this issue.

I m sending you login details of my store. please fix.