Duplicate coupons

Hi,

I noticed that i can define 2 discounts with same coupon code. Is this a standard in eCommerce? nopCommerce accept this, is this a bug or what? if not a bug, then what is the concept behind this?

do you check by enabling limitation?

This has already been discussed before and decided to leave the current approach. But maybe it's worth at least displaying a warning about this to the admin, I created a task.

Added a warning that will work if the entered code has already been used in another coupon before. Details in this commit.