diff --git a/addons/stock/models/stock_inventory.py b/addons/stock/models/stock_inventory.py
index 2f1b757960a..ed3d354b295 100644
--- a/addons/stock/models/stock_inventory.py
+++ b/addons/stock/models/stock_inventory.py
@@ -341,7 +341,7 @@ class InventoryLine(models.Model):
     # TDE FIXME: necessary ? -> replace by location_id
     prodlot_name = fields.Char(
         'Serial Number Name',
-        related='prod_lot_id.name', store=True)
+        related='prod_lot_id.name', store=True, readonly=True)
     company_id = fields.Many2one(
         'res.company', 'Company', related='inventory_id.company_id',
         index=True, readonly=True, store=True)