fix: check object instead of DB for amended_from field (#25645)

frappe/core/doctype/doctype/doctype.py

@@ -868,9 +868,7 @@ def export_types_to_controller(self):
 	def make_amendable(self):
 		"""If is_submittable is set, add amended_from docfields."""
 		if self.is_submittable:
-			docfield_exists = frappe.get_all(
-				"DocField", filters={"fieldname": "amended_from", "parent": self.name}, pluck="name", limit=1
-			)
+			docfield_exists = [f for f in self.fields if f.fieldname == "amended_from"]
 			if not docfield_exists:
 				self.append(
 					"fields",