How to have multiple coupon codes

I have issues having multiple coupon codes in ERPNext. The issue is: a coupon code is tied to a pricing rule and it’s advised to only have one pricing rule if it’s not to be applied to a transaction.

If a coupon code is tied to a pricing rule and I can only have one pricing rule active, how can I have multiple coupon codes in the system? Having one pricing rule means I’m limited to just one coupon code.