Clarified deprecation message for priceRule field
DeprecationDeprecation
This is a deprecation — the affected surface still works, but the vendor has marked it for removal. Plan a migration before it goes away.
What changed
The priceRule field in DraftOrderDuplicateLineItemsPayload now has a more detailed deprecation message indicating what to use instead (discountCode and discountTitle) and when it will be removed (2026-10). This is still a deprecation warning rather than a breaking change, but clients should begin migrating now.