diff --git a/addons/l10n_it_edi/models/ddt.py b/addons/l10n_it_edi/models/ddt.py
index 426e6a60b7c..1047e82303a 100644
--- a/addons/l10n_it_edi/models/ddt.py
+++ b/addons/l10n_it_edi/models/ddt.py
@@ -7,7 +7,7 @@ class L10nItDdt(models.Model):
     _name = 'l10n_it.ddt'
     _description = 'Transport Document'
 
-    invoice_id = fields.One2many('account.move', 'l10n_it_ddt_id', string='Invoice Reference', ondelete='cascade')
+    invoice_id = fields.One2many('account.move', 'l10n_it_ddt_id', string='Invoice Reference')
     name = fields.Char(string="Numero DDT", size=20, help="Transport document number", required=True)
     date = fields.Date(string="Data DDT", help="Transport document date", required=True)