fix: avoid mutating iterator while iterating over it

(cherry picked from commit fdfa39c231)

erpnext/stock/doctype/stock_entry/stock_entry.py

@@ -1452,7 +1452,7 @@ class StockEntry(StockController):
 				item_dict[item]["qty"] = 0
 
 		# delete items with 0 qty
-		list_of_items = item_dict.keys()
+		list_of_items = list(item_dict.keys())
 		for item in list_of_items:
 			if not item_dict[item]["qty"]:
 				del item_dict[item]