Order Editing API supports discounts on fulfilled line items

You can now apply discounts to line items that have already been fulfilled using the order editing API, resulting in more flexible order adjustments. The orderEditAddLineItemDiscount mutation now supports discount application to both fulfilled and unfulfilled line items.


This is a companion discussion topic for the original entry at https://shopify.dev/changelog/order-editing-api-supports-discounts-on-fulfilled-line-items
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