[fix] remove on_update in Item
diff --git a/erpnext/stock/doctype/item/item.py b/erpnext/stock/doctype/item/item.py
index b721029..53faa43 100644
--- a/erpnext/stock/doctype/item/item.py
+++ b/erpnext/stock/doctype/item/item.py
@@ -93,7 +93,6 @@
 				where parentfield='website_item_groups' and parenttype='Item' and parent=%s""", self.name)
 
 	def on_update(self):
-		super(Item, self).on_update()
 		invalidate_cache_for_item(self)
 		self.validate_name_with_item_group()
 		self.update_item_price()