Harden corporate website home menu cleanup

addons/mcs_corporate_website/models/website_setup.py

@@ -41,10 +41,20 @@ class McsCorporateWebsiteSetup(models.AbstractModel):
         for menu in home_menus:
             by_parent.setdefault(menu.parent_id.id or 0, self.env["website.menu"])
             by_parent[menu.parent_id.id or 0] |= menu
+        duplicate_ids = []
         for menus in by_parent.values():
             duplicates = menus.sorted(lambda item: item.id)[1:]
-            if duplicates:
-                duplicates.unlink()
+            duplicate_ids.extend(duplicates.ids)
         own_home = self.env.ref("mcs_corporate_website.menu_home", raise_if_not_found=False)
-        if own_home:
-            own_home.unlink()
+        if own_home and own_home.id not in duplicate_ids:
+            duplicate_ids.append(own_home.id)
+        if not duplicate_ids:
+            return
+        self.env.cr.execute(
+            "DELETE FROM ir_model_data WHERE model = %s AND res_id = ANY(%s)",
+            ["website.menu", duplicate_ids],
+        )
+        self.env.cr.execute(
+            "DELETE FROM website_menu WHERE id = ANY(%s)",
+            [duplicate_ids],
+        )