fix: Multiple subscription fixes (#39005)

fix: Multiple subscription fixes (#39005)

(cherry picked from commit 3b4b2275de)

Co-authored-by: Deepesh Garg <deepeshgarg6@gmail.com>

erpnext/controllers/accounts_controller.py

@@ -225,6 +225,11 @@ class AccountsController(TransactionBase):
 			apply_pricing_rule_on_transaction(self)
 
 		self.set_total_in_words()
+		self.set_default_letter_head()
+
+	def set_default_letter_head(self):
+		if hasattr(self, "letter_head") and not self.letter_head:
+			self.letter_head = frappe.db.get_value("Company", self.company, "default_letter_head")
 
 	def init_internal_values(self):
 		# init all the internal values as 0 on sa