adding row prompt warning

knvb

I am preparing user management table.
I got warning when I add a row.
I found that if I remove "data-order" from the first column, it warning message gone.
How can I fixed the problem?

Here is my code:

                        <table id="userTable" class="display">
                            <thead>
                                <tr>
                                    <th>User Name:</th>
                                    <th>Password:</th>
                                    <th align=center>Directory Access:</th>
                                    <th>Enabled</th>
                                    <th></th>
                                </tr>
                            </thead>
                            <tbody>
                                <tr>
                                    <td data-order="0,1000"><input type=hidden id="userName0" readonly style="border:none" value="anonymous">anonymous</td>
                                    <td></td>
                                    <td align=center><a href="javascript:void(0)" onclick="addDirAccess(0)">&#x271A;</a></td>
                                    <td><input value="1" type=checkbox id="isUserEnable0"></td>
                                    <td></td>
                                </tr>
                                <tr>
                                    <td data-order="1"><input type=hidden id="userName0" readonly style="border:none" value="anonymous">abc</td>
                                    <td></td>
                                    <td align=center><a href="javascript:void(0)" onclick="addDirAccess(0)">&#x271A;</a></td>
                                    <td><input value="1" type=checkbox id="isUserEnable0"></td>
                                    <td></td>
                                </tr>
                                <tr>
                                    <td><input type=hidden id="userName0" readonly style="border:none" value="anonymous">ab</td>
                                    <td></td>
                                    <td align=center><a href="javascript:void(0)" onclick="addDirAccess(0)">&#x271A;</a></td>
                                    <td><input value="1" type=checkbox id="isUserEnable0"></td>
                                    <td></td>
                                </tr>                               
                                <tr>
                                    <td>stamn</td>
                                    <td></td>
                                    <td align=center><a href="javascript:void(0)" onclick="addDirAccess(0)">&#x271A;</a></td>
                                    <td><input value="1" type=checkbox id="isUserEnable0"></td>
                                    <td></td>
                                </tr>

                                <tr>
                                    <td>tmchan</td>
                                    <td><input type=password id="password1"></td>
                                    <td align=center><a href="javascript:void(0)" onclick="addDirAccess(1)">&#x271A;</a></td>
                                    <td><input value="1" type=checkbox id="isUserEnable1"></td>
                                    <td style="font-size:30px">&#x1F5D1;</td>
                                </tr>
                            </tbody>
                        </table>
        <script>
            var userTable;
        $(document).ready(function() 
                                            {
                                                userTable=$('#userTable').DataTable(
                                                { 
                                                    "dom": '<"toolbar">frtip',
                                                    "CaseSensitive":true, 
                                                    "order": [[ 1, "asc" ]],
                                                    paging: false,
                                                    "info": true,
                                                    "orderCellsTop": true, 
                                                    "fixedHeader":true,
                                                    "columnDefs": [{"className": "dt-center", "targets": 2}]                                                    
                                                });
                                                $("div.toolbar").html("<a onclick='addRow()'>&nbsp;&#x271A;</a>");                                              
                                                /*var a=document.createElement("a");
                                                a.innerHTML="&#x271A;";
                                                $(a).insertBefore($("#userTable").prev());*/
                                            });
                                            function addRow()
                                            {
                                                userTable.row.add(["<input type=\"text\">","<input type=text>","&#x271A;","<input type=checkbox>","&#x2796;"]).draw(false);
                                                userTable.order([1, 'asc']).draw();
                                userTable.page('last').draw(false);
                                            }
        </script>