diff --git a/trytond/ir/queue.py b/trytond/ir/queue.py
index 36c60be618..8438806228 100644
--- a/trytond/ir/queue.py
+++ b/trytond/ir/queue.py
@@ -211,7 +211,7 @@ class _Method(object):
 
     def __call__(self, instances, *args, **kwargs):
         transaction = Transaction()
-        context = transaction.context
+        context = transaction.context.copy()
         name = context.pop('queue_name', 'default')
         now = datetime.datetime.now()
         scheduled_at = context.pop('queue_scheduled_at', None)