diff --git a/addons/stock/wizard/stock_return_picking.py b/addons/stock/wizard/stock_return_picking.py
index cf4a3b5765c..95e39b42533 100644
--- a/addons/stock/wizard/stock_return_picking.py
+++ b/addons/stock/wizard/stock_return_picking.py
@@ -183,6 +183,8 @@ class stock_return_picking(osv.osv_memory):
         for v in val_id:
             data_get = data_obj.browse(cr, uid, v, context=context)
             mov_id = data_get.move_id.id
+            if not mov_id:
+                raise osv.except_osv(_('Warning !'), _("You have manually created product lines, please delete them to proceed"))
             new_qty = data_get.quantity
             move = move_obj.browse(cr, uid, mov_id, context=context)
             new_location = move.location_dest_id.id