fix: test cases related to default letterhead change

(cherry picked from commit 8a2cb96c2a)

erpnext/accounts/doctype/process_statement_of_accounts/test_process_statement_of_accounts.py

@@ -18,8 +18,19 @@ class TestProcessStatementOfAccounts(AccountsTestMixin, IntegrationTestCase):
 	@classmethod
 	def setUpClass(cls):
 		super().setUpClass()
+		letterhead = frappe.get_doc("Letter Head", "Company Letterhead - Grey")
+		letterhead.is_default = 0
+		letterhead.save()
 		cls.enterClassContext(cls.change_settings("Selling Settings", validate_selling_price=0))
 
+	@classmethod
+	def tearDownClass(cls):
+		super().tearDownClass()
+		letterhead = frappe.get_doc("Letter Head", "Company Letterhead - Grey")
+		letterhead.is_default = 1
+		letterhead.save()
+		frappe.db.commit()  # nosemgrep
+
 	def setUp(self):
 		self.create_company()
 		self.create_customer()

erpnext/setup/install.py

@@ -316,6 +316,9 @@ def set_default_print_formats():
 		if frappe.get_meta(doctype).default_print_format:
 			continue
 
+		if not frappe.db.exists("Print Format", print_format):
+			continue
+
 		frappe.make_property_setter(
 			{
 				"doctype": doctype,
@@ -345,7 +348,7 @@ def create_letter_head():
 					"letter_head_name": name,
 					"source": "HTML",
 					"content": content,
-					"is_default": 1 if name == "Company Letterhead" else 0,
+					"is_default": 1 if name == "Company Letterhead - Grey" else 0,
 				}
 			)
 			doc.insert(ignore_permissions=True)