Not working 2 DateRangePicker (react-dates) on 1 page (反应日期)(在1页上不工作2个反应日期)

import { DateRangePicker } from 'react-dates';

<DateRangePicker
  startDate={this.state.startDate1}
  endDate={this.state.endDate1}
  onDatesChange={({ startDate, endDate }) => this.setState({ startDate1, endDate1 })}
  focusedInput={this.state.focusedInput1}
  onFocusChange={(focusedInput) => this.setState({ focusedInput1 })}
/>

<DateRangePicker
  startDate={this.state.startDate2}
  endDate={this.state.endDate2}
  onDatesChange={({ startDate, endDate }) => this.setState({ startDate2, endDate2 })}
  focusedInput={this.state.focusedInput2}
  onFocusChange={(focusedInput) => this.setState({ focusedInput2 })}
/>

constructor(props) {
  super(props);
  this.state = {
    startDate1: null,
    endDate1: null,
    focusedInput1: null,
    startDate2: null,
    endDate2: null,
    focusedInput2: null,
  };
}