Column Open of a Pandas DataFrame is lost #592

import datetime
from binance_historical_data import BinanceDataDumper

data_dumper = BinanceDataDumper(
    path_dir_where_to_dump=".",
    asset_class="spot",  # spot, um, cm
    data_type="klines",  # aggTrades, klines, trades
    data_frequency="1h",
)
data_dumper.dump_data(
    tickers="BTCUSDT",
    date_start=datetime.date(2023, 7, 1),
    date_end=None,
    is_to_update_existing=False,
)

from influxdb_client import InfluxDBClient, WriteOptions
import datetime
import pandas as pd

data_source = "binance"
asset_class = "spot"  # spot, um, cm
storage_frequency = "daily"  # daily, monthly
data_type = "klines"  # aggTrades, klines, trades
symbol = "BTCUSDT"
data_frequency = "1h"
dt = datetime.date(2023, 7, 1)
fname = f"C:\\Users\\w4c\\data\\{data_source}\\{asset_class}\\{storage_frequency}\\{data_type}\\{symbol}\\{data_frequency}\\{symbol}-{data_frequency}-{dt.year}-{dt.month:02}-{dt.day:02}.csv"
with InfluxDBClient.from_env_properties() as client:
    columns = [
        "OpenTime",
        "Open",
        "High",
        "Low",
        "Close",
        "Volume",
        "CloseTime",
        "Quote asset volume",
        "Number of trades",
        "Taker buy base asset volume",
        "Taker buy quote asset volume",
        "Ignore",
    ]
    for df in pd.read_csv(fname, chunksize=1_000, names=columns):
        # for col in ["OpenTime", "CloseTime"]:
        for col in ["OpenTime"]:
            df[col] = pd.to_datetime(df[col], unit="ms")
        df["CloseTime"] *= 1_000_000
        df["data_source"] = data_source
        df["asset_class"] = asset_class
        df["data_type"] = data_type
        df["data_frequency"] = data_frequency
        df["symbol"] = symbol
        print(df)
        print(df.dtypes)
        with client.write_api() as write_api:
            try:
                write_api.write(
                    record=df,
                    bucket="data",
                    data_frame_measurement_name="crypto",
                    data_frame_tag_columns=["data_source", "asset_class", "data_type", "symbol", "data_frequency"],
                    data_frame_timestamp_column="OpenTime",
                )
            except Exception as e:
                print(e)