elasticsearch阻止使用PostMan插入数据

我创建了一个新索引，其中包含以下设置：

"settings": {
            "index": {
                "number_of_shards": "5",
                "blocks": {
                    "read_only_allow_delete": "false" // null was tested also
                },
                "analysis": {
                    "filter": {
                        "autocomplete_filter": {
                            "type": "edge_ngram",
                            "min_gram": "1",
                            "max_gram": "20"
                        }
                    },
                    "analyzer": {
                        "autocomplete": {
                            "filter": [
                                "lowercase",
                                "autocomplete_filter"
                            ],
                            "type": "custom",
                            "tokenizer": "standard"
                        }
                    }
                },
                "number_of_replicas": "2"
            }
        }

现在当我第一次使用邮递员索引新文档时，它被正确编入索引，但是下一个文档发出错误，在我发送GET请求错误之后我注意到设置变为：

"settings": {
            "index": {
                "number_of_shards": "5",
                "blocks": {
                    "read_only_allow_delete": "true"
                },
                "analysis": {
                    "filter": {
                        "autocomplete_filter": {
                            "type": "edge_ngram",
                            "min_gram": "1",
                            "max_gram": "20"
                        }
                    },
                    "analyzer": {
                        "autocomplete": {
                            "filter": [
                                "lowercase",
                                "autocomplete_filter"
                            ],
                            "type": "custom",
                            "tokenizer": "standard"
                        }
                    }
                },
                "number_of_replicas": "2"
            }
        }

那么为什么在索引第一个文档之后 "read_only_allow_delete" 被设置为 true . 我在创建索引后验证了设置，但它不是 false 错误：

403 - {"error":{"root_cause":[{"type":"cluster_block_exception","reason":"blocked by: [FORBIDDEN/12/index read-only / allow delete (api)];"}],"type":"cluster_block_exception","reason":"blocked by: [FORBIDDEN/12/index read-only / allow delete (api)];"},"status":403}