diff --git a/erpnext/patches/v7_2/update_guardian_name_in_student_master.py b/erpnext/patches/v7_2/update_guardian_name_in_student_master.py
index 65c7ef0..6ac4073 100644
--- a/erpnext/patches/v7_2/update_guardian_name_in_student_master.py
+++ b/erpnext/patches/v7_2/update_guardian_name_in_student_master.py
@@ -2,6 +2,7 @@
 from frappe.model.utils.rename_field import rename_field
 
 def execute():
+    frappe.reload_doc("schools", "doctype", "student_guardian")
     student_guardians = frappe.get_all("Student Guardian", fields=["guardian"])
     for student_guardian in student_guardians:
         guardian_name = frappe.db.get_value("Guardian", student_guardian.guardian, "guardian_name")