diff --git a/sf_manufacturing/models/stock.py b/sf_manufacturing/models/stock.py
index 0c01a57c..ea8ca7c6 100644
--- a/sf_manufacturing/models/stock.py
+++ b/sf_manufacturing/models/stock.py
@@ -980,7 +980,8 @@ class ReStockMove(models.Model):
                 production = self.env['mrp.production'].search([('name', '=', self[0].origin)], limit=1, order='id asc')
                 productions = self.env['mrp.production'].search(
                     [('origin', '=', production.origin), ('product_id', '=', production.product_id.id)])
-                res['origin'] = ','.join(productions.mapped('name'))
+                if productions.mapped('name'):
+                    res['origin'] = ','.join(productions.mapped('name'))
                 res['retrospect_ref'] = production.product_id.name
         return res