FORBIDDEN/12/index read-only / allow delete (api)
官方解決方法：
curl -XPUT -H "Content-Type: application/json" http://127.0.0.1:9200/_all/_settings -d '{"index.blocks.read_only_allow_delete": null}'
_all 可以改為自己的索引名稱，也可以直接執行
curl -XPUT -H "Content-Type: application/json" http://127.0.0.1:9200/_all/_settings -d '{"index.blocks.read_only_allow_delete": null}'