Not able set throttling limits in AWS OpenSearch

I am using AWS OpenSearch with ML model. While creating ES cluster there is no parameter as "cluster_manager.throttling.thresholds.delete_index" in _cluster/settings. To Deploy ML model, We have to run "plugins.ml_commons.only_run_on_ml_node": false but it is creating default "cluster_manager.throttling.thresholds.delete_index" to 50 in cluster settings under persistent parameters which eventually deletes the index automatically. To update this parameter. I am not able to adjust these cluster settings related to threshold task limits to -1 (which shall disable the task).

Example : To set throttling limit for delete-index task to -1 :

PUT _cluster/settings { "persistent": { "cluster_manager.throttling.thresholds":{ "delete-index" : { "value" : -1 } }}. It gives error, {"Message":"Your request: '/_cluster/settings' payload is not allowed."}. Can you please let me know how to disable the index deletion automatically or update delete-index param in cluster setting?