How to reproduce:
1) Create item with ItemClass (itemId: 0, itemClass: Weapon)
2) Grant item to player
3) Change the ItemClass via dashboard (ex: Sword)
4) Call GetInventory
5) returned result will say something like {itemId: 0, iteminstanceId: xyz, itemClass: Weapon}
Expected result would be Sword?
This behavior is by design. Changing the catalog item’s attributes wouldn't affect the inventory instance items granted before the modification. If you want to change the instance item’s class, please revoke the original one, then grant a new one to the player after the modification. Or you can add the custom data for the corresponding instance items using this API Server.UpdateUserInventoryItemCustomData. For clarification, UpdateUserInventoryItemCustomData can't change the instance item's attributes too. It's a workaround to add some information to the granted inventory items.
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