Drop cloning the items in container with both dragable and droppable about angular-dragdrop HOT 1 OPEN

<ol style="display: block; min-height: 65px !important; background-color: #fff; border: 1px dotted #000; margin-bottom: 0px; padding:5px; padding-bottom: 15px;"
            data-drop="true" ng-model='listColumns' data-jqyoui-options="checkDropColumnDuplicateValue" jqyoui-droppable="{multiple:true, onDrop: 'dropColumnsCallback'}">
    <li ng-repeat="item in $parent.listColumns track by $index" data-drop="true" data-drag="true" ng-model="listColumns" tableName="{{item.tableName}}"
        columnAlias="{{item.columnAlias}}" uniqueId="{{item.uniqueId}}" dataType="{{item.dataType}}" dateFunction="{{item.dateFunction}}"
        aggre="{{item.aggregation}}" colType="columns" colBlockType="columns" dragType="allow" jqyoui-droppable="{ index: {{$index}}, deepCopy: false }"
        jqyoui-draggable="{index: {{$index}}, insertInline: true, animate: true, deepCopy : false, direction:'jqyouiDirection'}"
        data-jqyoui-options="{revert: 'invalid' }" data-direction="{{item.jqyouiDirection}}" class="btn btn-info btn-xs sortable"
        style="width:100%; margin-bottom:3px; text-align: left;" >
        <span class="badge" style="float: right" ng-click="removeList(item,'Columns')">X</span>
    </li>
</ol>

$scope.checkDroppableAcceptance = function () {
                   //TODO not able to set droppable accept option in html via data-jqyoui-options
                   $('li[colType]').droppable({
                       accept: function (elem) {
                           //return $(elem).attr('colType') === 'columns' ? true : false;
                           return elem.context.tagName === 'LI' ? true : false;
                       }
                   });
               };
$scope.checkDropColumnDuplicateValue = {
                   greedy: true,
                   accept: function (dragEl) {
                       var chkList1 = true;
                       //some code
                       $scope.checkDroppableAcceptance();
                       return chkList1;
                   }
               };