Goalify sales motivator app dynamically creates discount codes for each campaign. You do not need create any discount code by yourself from shopify discount panel. Goalify will create necessary discount code using shopify's state of the art api and attach it to the campaign. We highly recommend not to edit/delete these auto generated discount codes from shopify discounts management panel. Once modified or deleted, the related offer will not work properly.
If you accidentally modify any of the discount code related to any goalify offer, we highly recommend deleting the campaign and recreating it. It only takes a few minutes to setup a sales motivation offer. Reversing the changes in shopify discount is also a choice but unless you are very certain about it, we do not suggest it.