diff --git a/erpnext/selling/doctype/sales_order/sales_order.py b/erpnext/selling/doctype/sales_order/sales_order.py
index 2b60dcd..1b66c65 100644
--- a/erpnext/selling/doctype/sales_order/sales_order.py
+++ b/erpnext/selling/doctype/sales_order/sales_order.py
@@ -102,7 +102,6 @@
 		self.validate_warehouse()
 
 		from erpnext.stock.doctype.packed_item.packed_item import make_packing_list
-
 		make_packing_list(self,'sales_order_details')
 
 		self.validate_with_previous_doc()
diff --git a/erpnext/stock/doctype/packed_item/packed_item.py b/erpnext/stock/doctype/packed_item/packed_item.py
index cf208ee..44c1a00 100644
--- a/erpnext/stock/doctype/packed_item/packed_item.py
+++ b/erpnext/stock/doctype/packed_item/packed_item.py
@@ -12,18 +12,18 @@
 
 class PackedItem(Document):
 	pass
-		
+
 def get_sales_bom_items(item_code):
-	return frappe.db.sql("""select t1.item_code, t1.qty, t1.uom 
-		from `tabSales BOM Item` t1, `tabSales BOM` t2 
+	return frappe.db.sql("""select t1.item_code, t1.qty, t1.uom
+		from `tabSales BOM Item` t1, `tabSales BOM` t2
 		where t2.new_item_code=%s and t1.parent = t2.name""", item_code, as_dict=1)
 
 def get_packing_item_details(item):
-	return frappe.db.sql("""select item_name, description, stock_uom from `tabItem` 
+	return frappe.db.sql("""select item_name, description, stock_uom from `tabItem`
 		where name = %s""", item, as_dict = 1)[0]
 
 def get_bin_qty(item, warehouse):
-	det = frappe.db.sql("""select actual_qty, projected_qty from `tabBin` 
+	det = frappe.db.sql("""select actual_qty, projected_qty from `tabBin`
 		where item_code = %s and warehouse = %s""", (item, warehouse), as_dict = 1)
 	return det and det[0] or ''
 
@@ -55,12 +55,15 @@
 	if not pi.batch_no:
 		pi.batch_no = cstr(line.get("batch_no"))
 	pi.idx = packing_list_idx
-	
+
 	packing_list_idx += 1
 
 
 def make_packing_list(obj, item_table_fieldname):
 	"""make packing list for sales bom item"""
+
+	if obj._action == "update_after_submit": return
+
 	packing_list_idx = 0
 	parent_items = []
 	for d in obj.get(item_table_fieldname):
@@ -68,14 +71,14 @@
 			and d.warehouse or d.warehouse
 		if frappe.db.get_value("Sales BOM", {"new_item_code": d.item_code}):
 			for i in get_sales_bom_items(d.item_code):
-				update_packing_list_item(obj, i['item_code'], flt(i['qty'])*flt(d.qty), 
+				update_packing_list_item(obj, i['item_code'], flt(i['qty'])*flt(d.qty),
 					warehouse, d, packing_list_idx)
 
 			if [d.item_code, d.name] not in parent_items:
 				parent_items.append([d.item_code, d.name])
-			
+
 	cleanup_packing_list(obj, parent_items)
-		
+
 def cleanup_packing_list(obj, parent_items):
 	"""Remove all those child items which are no longer present in main item table"""
 	delete_list = []
@@ -86,10 +89,9 @@
 
 	if not delete_list:
 		return obj
-	
+
 	packing_details = obj.get("packing_details")
 	obj.set("packing_details", [])
 	for d in packing_details:
 		if d not in delete_list:
 			obj.append("packing_details", d)
-	
\ No newline at end of file