diff --git a/addons/mail/models/mail_alias_mixin_optional.py b/addons/mail/models/mail_alias_mixin_optional.py
index fd8e383dd0e..00b9371961f 100644
--- a/addons/mail/models/mail_alias_mixin_optional.py
+++ b/addons/mail/models/mail_alias_mixin_optional.py
@@ -18,7 +18,7 @@ class AliasMixinOptional(models.AbstractModel):
     _description = 'Email Aliases Mixin (light)'
     ALIAS_WRITEABLE_FIELDS = ['alias_domain_id', 'alias_name', 'alias_contact', 'alias_defaults', 'alias_bounced_content']
 
-    alias_id = fields.Many2one('mail.alias', string='Alias', ondelete="restrict", required=False)
+    alias_id = fields.Many2one('mail.alias', string='Alias', ondelete="restrict", required=False, copy=False)
     alias_name = fields.Char(related='alias_id.alias_name', readonly=False)
     alias_domain_id = fields.Many2one(
         'mail.alias.domain', string='Alias Domain',
diff --git a/addons/test_mail/tests/test_mail_alias.py b/addons/test_mail/tests/test_mail_alias.py
index af639075c6a..f6cfad8cc60 100644
--- a/addons/test_mail/tests/test_mail_alias.py
+++ b/addons/test_mail/tests/test_mail_alias.py
@@ -807,6 +807,18 @@ class TestMailAliasMixin(TestMailAliasCommon):
         record_copy2 = record_copy.copy()
         self.assertEqual(record_copy2.alias_bounced_content, new_content)
 
+    @users('employee')
+    def test_copy_optional_alias_model(self):
+        """ Do not propagate alias_id to duplicate record as it could lead to
+        overwriting alias_name of old record. """
+        record = self.env['mail.test.alias.optional'].create({
+            'name': 'Test Optional Alias Record',
+            'alias_name': 'test.optional.alias.record',
+        })
+        self.assertTrue(record.alias_id)
+        record_copy = record.copy()
+        self.assertFalse(record_copy.alias_id)
+
     @users('erp_manager')
     def test_multi_company_setup(self):
         """ Test company impact on alias domains when creating or updating