How to avoid showing old data on extjs comobox while querying.

Problem:  When I click on combobox. It shows the old data in blur before it display new data. Some time it does not  allow me to select  the combobox.  Those kind of issue will appear only when you load combobox as raw static data and then try to load using query.

Solution:

        xtype: 'combobox',

        name: 'interNalFaeId',

        itemId: 'interNalFaeId',

        fieldLabel: 'Arrow FAE',

        editable: false,

        listeners: {

          beforequery: function(queryEvent) {

            if (queryEvent.combo.lastQuery !== queryEvent.query) {

              queryEvent.combo.store.removeAll();

            }

          },

          scope: me

        }