Do not apply coupon discount on product addons

Hello, I have a rather unusual problem. In a Woocommerce that also uses the WooCommerce Bookings and WooCommerce Product Add-ons plugins I would like to setup coupons that only apply to the base product price and not on the add-ons.

For a example if my base bookable product has a cost of $100 and the user selects an add-on that costs $20 and applies a coupon that grants 10% discount I want the discount to be $10 and not $12.

Is this possible? If yes what add-on can achieve it?

Thank you.