on change client script using GlideRecord not working

AnjaliY27945328
Tera Contributor
 var grUser=new GlideRecord('sys_user');
  grUser.addQuery('sys_id','6816f79cc0a8016401c5a33be04be441');
  grUser.query();
  if(grUser.next())
  {
    g_form.setValue('u_email',grUser.email);
    g_form.setValue('u_location',grUser.location);
    g_form.setValue('u_department',grUser.department);
  }
 
 
filed are not populated on changing caller field pls correct my error