Auto_date_histogram and extended_bounds

Hello,

I am trying to make a query using auto_date_histogram and extended_bounds but i get the error:
[auto_date_histogram] unknown field [extended_bounds]

the documentation for auto_date_histogram does mention extended_bounds in the note but I can't figure it out. here is the documentation I am looking at where it mentions extended_bounds:

here is my query:

GET poller-*/_search
{
  "aggs": {
          "time_buckets": {
            "auto_date_histogram": { 
              "field": "timestamp",
              "buckets": 100,
              "minimum_interval": "minute",
              "format": "epoch_millis",
              "extended_bounds": {
               "min": 0,
                "max": 500
              }
            },
            "aggs": {
              "ifhcin_avg": {
                "avg": {
                  "field": "ifhcin_avg"
                }
              },
                "ifhcin_max": {
                "max": {
                  "field": "ifhcin_max"
                }
              },
              "ifhcout_avg": {
                "avg": {
                  "field": "ifhcout_avg"
                }
              },
                "ifhcout_max": {
                "max": {
                  "field": "ifhcout_max"
                }
              },
                "bw_in": {
                "max": {
                  "field": "bw_in_util_pct"
                }
              },
                "bw_out": {
                "max": {
                  "field": "bw_out_util_pct"
                }
              },
                "ifSpeed": {
                "max": {
                  "field": "ifSpeed"
                }
              },
              "percentage": {
                "bucket_script": {
                  "buckets_path": {
                    "in": "bw_in",
                    "out": "bw_out"
                  },
                  "script": "if (params.in > 0.50) { return (1) } else if (params.out > 0.50) { return (1) } else { if (params.in > params.out) { return (params.in) } else if (params.out > params.in) { return (params.out) } }"
                }
              },
              "none": {
                "bucket_script": {
                  "buckets_path": {
                    "in": "bw_in",
                    "out": "bw_out",
                    "speed": "ifSpeed"
                  },
                  "script": "if (params.in > 0.50) { return (params.speed) } else if (params.out > 0.50) { return (params.speed) } else { return null }"
                }
              },
              "largest": {
                "bucket_script": {
                  "buckets_path": {
                    "in": "ifhcin_max",
                    "out": "ifhcout_max"
                  },
                  "script": "if (params.in < params.out) { return params.in } else if (params.out < params.in) { return params.out } else { return params.in }"
                }
              }
            }
          }
        },
        "size": 20
}

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