From d2b09f71c3153f71252dea7f7d066ab446188ec2 Mon Sep 17 00:00:00 2001
From: Shllokkk <shllokosan23@gmail.com>
Date: Sat, 16 May 2026 17:57:46 +0530
Subject: [PATCH] fix: populate missing letter_head_for in tabLetter Head  and
 set default letterheads

---
 erpnext/patches.txt                           |  3 +-
 ...ault_letter_head_for_doctype_and_report.py | 44 +++++++++++++++++++
 2 files changed, 46 insertions(+), 1 deletion(-)
 create mode 100644 erpnext/patches/v16_0/set_default_letter_head_for_doctype_and_report.py

diff --git a/erpnext/patches.txt b/erpnext/patches.txt
index 918d4a1b054..d8f432f1d96 100644
--- a/erpnext/patches.txt
+++ b/erpnext/patches.txt
@@ -480,4 +480,5 @@ erpnext.patches.v16_0.merge_repost_settings_to_accounts_settings
 erpnext.patches.v16_0.set_root_type_in_account_categories
 erpnext.patches.v16_0.scr_inv_dimension
 erpnext.patches.v16_0.packed_item_inv_dimen
-erpnext.patches.v16_0.set_not_applicable_on_german_item_tax_templates
\ No newline at end of file
+erpnext.patches.v16_0.set_not_applicable_on_german_item_tax_templates
+erpnext.patches.v16_0.set_default_letter_head_for_doctype_and_report
\ No newline at end of file
diff --git a/erpnext/patches/v16_0/set_default_letter_head_for_doctype_and_report.py b/erpnext/patches/v16_0/set_default_letter_head_for_doctype_and_report.py
new file mode 100644
index 00000000000..c6826cdba17
--- /dev/null
+++ b/erpnext/patches/v16_0/set_default_letter_head_for_doctype_and_report.py
@@ -0,0 +1,44 @@
+import frappe
+from frappe.query_builder import DocType
+
+
+def execute():
+	LH = DocType("Letter Head")
+	update_letter_head_for_query = (
+		frappe.qb.update(LH).set(LH.letter_head_for, "DocType").where(LH.letter_head_for.isnull())
+	)
+
+	update_letter_head_for_query.run()
+
+	for letter_head_for in ("DocType", "Report"):
+		default_exists = frappe.db.exists(
+			"Letter Head",
+			{
+				"is_default": 1,
+				"letter_head_for": letter_head_for,
+			},
+		)
+
+		if default_exists:
+			continue
+
+		standard_letter_head = frappe.db.get_value(
+			"Letter Head",
+			{
+				"standard": "Yes",
+				"disabled": 0,
+				"letter_head_for": letter_head_for,
+			},
+			"name",
+		)
+
+		if not standard_letter_head:
+			continue
+
+		frappe.db.set_value(
+			"Letter Head",
+			standard_letter_head,
+			"is_default",
+			1,
+			update_modified=False,
+		)