记录：another snapshot is currently being deleted

Caused by: org.elasticsearch.client.ResponseException: method [DELETE], host [http://localhost:9200], URI [/_snapshot/es_bak_20200220/snapshot-2021-08-16?master_timeout=30s], status line [HTTP/1.1 503 Service Unavailable]

{
    "error":{
        "root_cause":[
            {
                "type":"concurrent_snapshot_execution_exception",
                "reason":"[es_bak_20200220:snapshot-2021-08-16/iTsJV_pFQEaN1o2YW2eQfg] cannot delete - another snapshot is currently being deleted"
            }
        ],
        "type":"concurrent_snapshot_execution_exception",
        "reason":"[es_bak_20200220:snapshot-2021-08-16/iTsJV_pFQEaN1o2YW2eQfg] cannot delete - another snapshot is currently being deleted"
    },
    "status":503
}