diff --git a/ext/custom-addons/dp_custom/models/sale.py b/ext/custom-addons/dp_custom/models/sale.py
index 4e04c433..4b9660e8 100644
--- a/ext/custom-addons/dp_custom/models/sale.py
+++ b/ext/custom-addons/dp_custom/models/sale.py
@@ -514,7 +514,7 @@ class SaleOrderLine(models.Model):
         self.ensure_one()
         allowed_write = True
         precision_digits = self.env['decimal.precision'].precision_get('Product Price')
-        if self.from_designbox and set(vals.keys()).intersection(not_allowed_designbox_keys):
+        if (self.from_designbox and self.product_id.default_code!='TZ_PLATTE') and set(vals.keys()).intersection(not_allowed_designbox_keys):
             for val_key in not_allowed_designbox_keys:
                 if val_key in list(vals.keys()) and type(self.__getattribute__(val_key)) is float:
                     if float_compare(self.__getattribute__(val_key), vals[val_key],