Incrementally updates the quantityOnStock by the specified amount. This changes the availableQuantity, based on the number of active reservations.
To set an absolute quantity value instead, use the [InventoryEntryChangeQuantityAction](ctp:api:type:InventoryEntryChangeQuantityAction) update action.
Incrementally updates the
quantityOnStockby the specified amount. This changes theavailableQuantity, based on the number of active reservations.