I tried deleting it via API and it returned 400 error.
This is the status of the index
200
[{‘collectionName’: ‘admin_boundaries’, ‘database’: ‘_’, ‘indexID’: ‘67402e92179b0e1541b62ea2’, ‘mappings’: {‘dynamic’: True}, ‘name’: ‘address_search’, ‘status’: ‘IN_PROGRESS’, ‘synonyms’: }]