fix: Unexpected "Copied_from_block" field in Advanced Settings (#34472)

Closes #34370

cms/djangoapps/models/settings/course_metadata.py

@@ -3,8 +3,8 @@
 """
 
 
-from datetime import datetime
 import logging
+from datetime import datetime
 
 import pytz
 from django.conf import settings
@@ -81,6 +81,7 @@ class CourseMetadata:
         'highlights_enabled_for_messaging',
         'is_onboarding_exam',
         'discussions_settings',
+        'copied_from_block',
     ]
 
     @classmethod