[Python] Some csv file can't import data into bt.feeds.PandasData?

I solved some of the previous problems, but I encountered a new problem. Only the first of my multiple csv files could be imported into data and read, while the other files could not complete the process, they were almost the same. The following is the code that can be replicated after I simplified it

import datetime
from datetime import timedelta, datetime
import ccxt
import backtrader as bt
import pandas as pd
import os

class TestStrategy(bt.Strategy):

def __init__(self):#计算指标
self.dataclose=self.datas[0].open
print(len(self.datas[0]))
def next(self):#调用指标和策略
self.log('dataclose,%.2f'%self.dataclose[0])
print('1')
def log(self,text):
dt=self.datas[0].datetime.date(0)
print('%s %s'%(dt.isoformat(),text))
print(1)

if __name__=='__main__':
cerebro = bt.Cerebro()
since_time = datetime(year=2024, month=12, day=1)
to_time = datetime(year=2025, month=4, day=1)
since_time_1 = datetime(year=2024, month=12, day=12, hour=17, minute=30, second=0)

file_path = "E:/PycharmProjects/PythonProject/backtrader/data/2025-12-12 17：30：00.csv"#efficient one
file_path_1 = "E:/PycharmProjects/PythonProject/backtrader/data/2025-01-16 22：00：00.csv" #others can't
df = pd.read_csv(file_path, parse_dates=['datetime']) # 将 datetime 列解析为日期时间类型
df.index = pd.to_datetime(df.datetime)
df['openintrest'] = 0
# 对dataframe的数据列进行一个整合
df = df[['open', 'high', 'low', 'close', 'volume', 'openintrest']]
print(df)
data = bt.feeds.PandasData(
dataname=df,
fromdate=since_time,
todate=since_time_1,
)

cerebro.adddata(data)
cerebro.addstrategy(TestStrategy)
cerebro.run()


Attached is a screenshot of the first few lines of the two csv filesenter image description here

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