七牛jssdk上傳遇到Duplicate file error問題。

1.問題描述：
整個流程是：使用七牛jssdk上傳至七?？臻g，比如上傳圖片為1.jpg,上傳后,服務(wù)端寫好了刪除七?？臻g中文件的接口，前段ajax調(diào)用接口去刪除剛才的1.jpg，這個時候，用戶發(fā)現(xiàn)自己刪除錯了，需要重新上傳1.jpg,然后就會報這個錯誤
2.代碼：
前端上傳

            var obj_stepup = new QiniuJsSDK(),
            par_stepup = pubFun.pubqiniuup({
                browse_button: 'stepthumb',
                container: 'stepthumbparent',
                drop_element: 'stepthumbparent',
                domain: 'http://oev0goahc.bkt.clouddn.com', 
                get_new_uptoken: false,
                auto_start: true,
                log_level: 5,
                unique_names: false,
                save_key: false ,
                multi_selection:false,
                filters : {
                    max_file_size : '100mb',
                    prevent_duplicates: true,
                    // Specify what files to browse for
                    mime_types: [
                        {title : "Image files", extensions : "jpg,gif,png"} // 限定jpg,gif,png后綴上傳
                    ]
                },
                uptoken_func: function(){
                    var obj_token={};
                    $.ajax({
                        url:'file/gettoken',
                        type:'post',
                        data:{space:'stepimgspace'},
                        async:false,
                        success:function(_data){
                            if('suc'==_data.msg){
                                obj_token['uptoken'] = _data.data.uptoken;
                            }
                        },
                        error:function(){
                            
                        }
                     });
                      return obj_token.uptoken;
                },
                init: {
                    'FilesAdded': function(up, files) {

                    },
                    'UploadComplete': function() {

                    },
                    'FileUploaded': function(up, file, info) {

                    },
                    'Error': function(up, err, errTip) {
                        console.log(789,up,err,errTip)
                    },
                    'Key': function(up, file) {
                       var key = file.name;
                      //  do something with key
                       return key
                   }
                }
            }),
            setpupload = obj_stepup.uploader(par_stepup);

刪除ajax：

        $.ajax({
            url:'file/delqiniu',
            data:{data:JSON.stringify(par.obj_imgname)},
            success:function(_data){
                
            },error:function(){
                
            }
        });

后臺刪除方法：

delqiniu(_this,_call){
    let i=0;
    let obj_arr = [];
    qiniu.conf.ACCESS_KEY = '****************************************';
    qiniu.conf.SECRET_KEY = '****************************************';    
    //構(gòu)建bucketmanager對象
    let client = new qiniu.rs.Client();
    let obj_data = JSON.parse(_this.paramValue('data'));
    for (let value in obj_data) {
        obj_arr.push(obj_data[value]);
    }
    //你要測試的空間， 并且這個key在你空間中存在
    let bucket = obj_data.space;
    function removefile(){
        var key = obj_arr[i];
        client.remove(bucket, key, function(err, ret) {
          if (!err) {
              i++;
              console.log(5555555,i);
              if(i==obj_arr.length-1){
                  _call({msg:'suc',id:10007});
                  return;
              }
              removefile();
          } else {
              if(612==err.code){
                  _call({msg:'suc',id:10007});
                  return;
              }
            console.log(err);
          }
        });
    }

// //刪除資源

    removefile();
}

獲取token:

gettoken(_this,_call){
    var qiniu = require("qiniu");
    var str_space = _this.paramValue('space');
    qiniu.conf.ACCESS_KEY = '****************************************';
    qiniu.conf.SECRET_KEY = '****************************************';
    var bucket = str_space;
    console.log(11111,bucket,str_space);
    function uptoken(bucket) {
      var putPolicy = new qiniu.rs.PutPolicy(bucket);
      console.log(putPolicy,putPolicy.token());
      return putPolicy.token();
    }
    var token = uptoken(bucket);
    console.log(token);
    _call({id:'10006',msg:'suc',result:{uptoken:token}});
}

3.報錯信息：
圖片描述