diff --git a/addons/purchase/models/stock.py b/addons/purchase/models/stock.py
index fd884df4..1a9e4284 100644
--- a/addons/purchase/models/stock.py
+++ b/addons/purchase/models/stock.py
@@ -184,3 +184,12 @@ class Orderpoint(models.Model):
         result['domain'] = "[('id','in',%s)]" % (purchase_ids.ids)
 
         return result
+
+
+class PushedFlow(models.Model):
+    _inherit = "stock.location.path"
+
+    def _prepare_move_copy_values(self, move_to_copy, new_date):
+        res = super(PushedFlow, self)._prepare_move_copy_values(move_to_copy, new_date)
+        res['purchase_line_id'] = None
+        return res