Discounted products for which coupons must not work

Hi everyone,
I have an issue that I don’t know how to solve; I would like discounted products (those for which I have set a sale price lower than the list price) not to be further discounted when a coupon with a discount is applied at checkout.
Is this possible?
Thanks in advance to anyone who replies.

You can add a Products condition to exclude such products. Or a custom mod can be made to automatically do this for you.

Hello.

In our addon you can disable applying of coupons for discounted products

I have around 400/500 items (across multiple categories) and I would like to avoid excluding them manually one by one.
I was thinking of setting the items as a Catalog Promotion, but in that case, since the coupon works as a cart rule, one rule doesn’t exclude the other