why did not appear image thumbanails with two upload input buttons?

I am working with laravel 5.6 and I have image upload button with my form. currently it is using upload single file.

<div class="form-group row required">
            <div class="field" align="left" >
            <h3>Upload  images</h3>
            <input type="file" id="files" name="files[]" multiple />
</div>
        </div>

jquery

<script >
    $(document).ready(function() {
  if (window.File && window.FileList && window.FileReader) {
    $("#files").on("change", function(e) {
      var files = e.target.files,
        filesLength = files.length;
      for (var i = 0; i < filesLength; i++) {
        var f = files[i]
        var fileReader = new FileReader();
        fileReader.onload = (function(e) {
          var file = e.target;
          $("<span class=\"pip\">" +
            "<img class=\"imageThumb\" src=\"" + e.target.result + "\" title=\"" + file.name + "\"/>" +
            "<br/><span class=\"remove\">Remove image</span>" +
            "</span>").insertAfter("#files");
          $(".remove").click(function(){
            $(this).parent(".pip").remove();
          });
          });
        fileReader.readAsDataURL(f);
      }
    });
  } else {
    alert("Your browser doesn't support to File API")
  }
});
    
 </script>

css

input[type="file"] {
  display: block;
}
.imageThumb {
  max-height: 75px;
  border: 2px solid;
  padding: 1px;
  cursor: pointer;
}
.pip {
  display: inline-block;
  margin: 10px 10px 0 0;
}
.remove {
  display: block;
  background: #444;
  border: 1px solid black;
  color: white;
  text-align: center;
  cursor: pointer;
}
.remove:hover {
  background: white;
  color: black;
}

now I add another upload input to same form like this,

<div class="form-group row required">
            <div class="field" align="left" >
            <h3>Upload  images</h3>
            <input type="file" id="files" name="files[]" multiple />
            <input type="file" id="files" name="files[]" multiple />//new one
            </div>

            
        </div>

then first upload button can appear image thumbanail but second file input did not display thumbanails.....what is the problem. how can fix this problem?