[stock ledger][fix] message for negative qty error
diff --git a/stock/stock_ledger.py b/stock/stock_ledger.py
index 2480263..10e490c 100644
--- a/stock/stock_ledger.py
+++ b/stock/stock_ledger.py
@@ -35,6 +35,9 @@
 			"posting_time": "12:00"
 		}
 	"""
+	global _exceptions
+	_exceptions = []
+	
 	previous_sle = get_sle_before_datetime(args)
 	
 	qty_after_transaction = flt(previous_sle.get("qty_after_transaction"))