第二个bootstrap datepicker不工作

Question

我有两个不同ID的日期选择器，只有一个正在使用

<div class="form-group">
                <label class="col-sm-3 control-label">From</label>
                <div class="col-sm-4">
                <div class="input-group date">
                  <div class="input-group-addon">
                    <i class="fa fa-calendar"></i>
                  </div>
                  <input type="text" class="form-control" name="peak_start_date_from" value="" id="start_datepicker" required>
                </div>
                </div>

不工作

<div class="form-group">
                <label class="col-sm-3 control-label">From</label>
                <div class="col-sm-4">
                <div class="input-group date">
                  <div class="input-group-addon">
                    <i class="fa fa-calendar"></i>
                  </div>
                  <input type="text" class="form-control" name="peak_start_date_from" value="" id="peak_start_date_from" required>
                </div>
                </div>

 $(document).ready(function() {
    $('#peak_start_date_from').datepicker();
});