Redirect

Hi Sir,
Please,
I added a link to the text field redirect, and then I updated the product.
Everything is working good.
But,
when I access the same product, and I tried to remove the link, and update the product again, then the redirect link is not removed and it is still there, Please, why, and how can i fix this issue?

Regards
A.J.

https://wordpress.org/plugins/woocommerce-add-to-cart-custom-redirect/