do not save virtual item

src/main/java/emu/grasscutter/game/inventory/Inventory.java

@@ -218,6 +218,7 @@ public class Inventory implements Iterable<GameItem> {
 		}
 		
 		// Set ownership and save to db
+		if (item.getItemData().getItemType() != ItemType.ITEM_VIRTUAL)
 			item.save();
 		
 		return item;