diff --git a/erpnext/stock/doctype/delivery_note/delivery_note.json b/erpnext/stock/doctype/delivery_note/delivery_note.json
index b85f296d0bd9..7873d3e6de43 100644
--- a/erpnext/stock/doctype/delivery_note/delivery_note.json
+++ b/erpnext/stock/doctype/delivery_note/delivery_note.json
@@ -301,7 +301,8 @@
    "no_copy": 1,
    "options": "Delivery Note",
    "print_hide": 1,
-   "read_only": 1
+   "read_only": 1,
+   "search_index": 1
   },
   {
    "collapsible": 1,
@@ -1401,7 +1402,7 @@
  "idx": 146,
  "is_submittable": 1,
  "links": [],
- "modified": "2023-09-04 14:15:28.363184",
+ "modified": "2023-12-18 17:19:39.368239",
  "modified_by": "Administrator",
  "module": "Stock",
  "name": "Delivery Note",
diff --git a/erpnext/stock/doctype/delivery_note/delivery_note.py b/erpnext/stock/doctype/delivery_note/delivery_note.py
index a101bdf244ce..675f8e9158a2 100644
--- a/erpnext/stock/doctype/delivery_note/delivery_note.py
+++ b/erpnext/stock/doctype/delivery_note/delivery_note.py
@@ -1294,7 +1294,3 @@ def update_details(source_doc, target_doc, source_parent):
 	)
 
 	return doclist
-
-
-def on_doctype_update():
-	frappe.db.add_index("Delivery Note", ["customer", "is_return", "return_against"])