Action RPG Inventory System

Please see previous reply (thread up 2 threads)… but its giving errors if I change the “Inventory Item” Struct also… and try to package game

Error: UStructProperty::Serialize Loading: Property ‘StructProperty /Game/InventorySystem/Blueprints/Components/InventoryComponent.InventoryComponent_C:GetInventoryItems.InventoryItems.InventoryItems’. Unknown structure.

is there a trick to refreshing the struct after editing it?

because it seems like if I add an entry to the struct… it then becomes an “unknown structure”