Mass remove coupon codes?

Hi

I use a tool in opencart admin so I can mass add coupon codes at once. This works great.

But I've made a terrible mistake! I've mass added codes but onto the incorrect product.

I want to mass remove them. I'm sure there is a way in myslq or myphpadmin a really quick way but I have no idea how I would do this.

if anyone has an idea please share.

Thank you

I'm using Version 1.5.6