隐藏列后在数据表中获取错误

Question

在我的表单中，我有一个2选择的选择框： 当你选择其中一个时，我的DataTable必须改变他的专栏：

＆＃13;

＆＃13;

//Changing TYpe of Price level will change datatable
$('#price_method').on("change", function(){
  //Declare the variable
  var oTable=$('#item_pricelvl').DataTable();
  oTable.clear();
  //Destroying the table and then rebuilding it again
  oTable.destroy();
  //If Selected Price Override			
  if ($(this).val()=="PO"){
    //I gotta hide a column
    $('#item_pricelvl').DataTable({
      "columnDefs":[
        {
          "class":"details-control",				
        },
        {				
          "targets":['_all'],
          "orderable":false
        },
        //I'm hiding the 4th column 
        { "visible": false, "targets": 4 },
        "Column"
      ],
    })
  }else{ //Else I can show all columns
    $('#item_pricelvl').DataTable({
      "columnDefs":[
        {
          "class":"details-control",				
        },
        {				
          "targets":['_all'],
          "orderable":false
        },					
        "Column"
      ],
    })	
  }		
});

//INSERT NEW PRICE LEVEL INTO THE ITEM PRICE TABLE
$('#insertplvl').click(function(){
  //Checking what method is selected
  if ($('#price_method').val()=="CM"){
    //starting to add the new row into the DataTable, and No columns hiding
    it_det.row.add([			
    "D",
    "COST MARKUP",
    "1",
    "999999999",
    "0.00",
    "0.00",
    "<input type='checkbox' name='chkdet' class='chk_plvl' id='"+ct_row+"'/>"
    ]).draw(false);
  }else{
    //starting to add the new row into the DataTable, and adding just 6 values because of the hide column 
    it_det.row.add([			
    "D",
    "PRICE OVERRIDE",
    "1",
    "999999999",			
    "0.00",
    "<input type='checkbox' name='chkdet' class='chk_plvl' id='"+ct_row+"'/>"
    ]).draw(false);
  }
  //Increasing the counter
  ct_row++;
})

＆＃13;

<table id="item_pricelvl" class="table table-bordered table-striped">
  <thead>
    <tr>												
      <th>Price Level</th>
      <th>Pricing Method</th>									
      <th>From Quantity</th>
      <th>To Quantity</th>									
      <th>Markup Amount</th>									
      <th>Unit Price</th>
      <th><input type="checkbox" class="checkall" /></th>												
    </tr>
  </thead>																	
</table>

＆＃13;

＆＃13;

＆＃13;

当我尝试插入选择＆＃34; POP时，我收到此错误：

  

DataTables警告：table id = item_pricelvl - 请求的未知参数＆＃39; 6＆＃39;对于第0行，第6列。有关此错误的详细信息，请参阅http://datatables.net/tn/4

下面我粘贴了此页面的屏幕 因此，如果它使用所有列，为什么当我将列隐藏时会出现错误？