diff --git a/addons/survey/models/survey_survey.py b/addons/survey/models/survey_survey.py
index a08f735bd82..e486ef9a41c 100644
--- a/addons/survey/models/survey_survey.py
+++ b/addons/survey/models/survey_survey.py
@@ -61,7 +61,7 @@ class Survey(models.Model):
         ('public', 'Anyone with the link'),
         ('token', 'Invited people only')], string='Access Mode',
         default='public', required=True)
-    access_token = fields.Char('Access Token', default=lambda self: self._get_default_access_token())
+    access_token = fields.Char('Access Token', default=lambda self: self._get_default_access_token(), copy=False)
     users_login_required = fields.Boolean('Login required', help="If checked, users have to login before answering even with a valid token.")
     users_can_go_back = fields.Boolean('Users can go back', help="If checked, users can go back to previous pages.")
     users_can_signup = fields.Boolean('Users can signup', compute='_compute_users_can_signup')