diff --git a/addons/purchase/purchase.py b/addons/purchase/purchase.py
index 2687b82c311..89e7e10b812 100644
--- a/addons/purchase/purchase.py
+++ b/addons/purchase/purchase.py
@@ -398,6 +398,7 @@ class PurchaseOrder(models.Model):
         result = action.read()[0]
 
         #override the context to get rid of the default filtering on picking type
+        result.pop('id', None)
         result['context'] = {}
         pick_ids = sum([order.picking_ids.ids for order in self], [])
         #choose the view_mode accordingly