diff --git a/addons/l10n_it_edi/models/account_invoice.py b/addons/l10n_it_edi/models/account_invoice.py
index 38147100b16..6b5d122f6b0 100644
--- a/addons/l10n_it_edi/models/account_invoice.py
+++ b/addons/l10n_it_edi/models/account_invoice.py
@@ -21,7 +21,7 @@ class AccountMove(models.Model):
     _inherit = 'account.move'
 
     l10n_it_edi_transaction = fields.Char(copy=False, string="FatturaPA Transaction")
-    l10n_it_edi_attachment_id = fields.Many2one('ir.attachment', copy=False, string="FatturaPA Attachment")
+    l10n_it_edi_attachment_id = fields.Many2one('ir.attachment', copy=False, string="FatturaPA Attachment", ondelete="restrict")
 
     l10n_it_stamp_duty = fields.Float(default=0, string="Dati Bollo", readonly=True, states={'draft': [('readonly', False)]})