Hello! I'm trying to create multiple coupons for use with one product, but when I try to connect the second coupon, I get an error message "this association already exists." Does anyone know a workaround? I have one membership product and I want to have 3 pricing levels: (1) standard, (2) partial discount, (3) bigger discount. I was thinking creating 2 coupons would accomplish this, but that doesn't seem to be working. Any ideas?