ecshop Notice: unserialize() includes\cls_session.php on line 163

Notice: unserialize() [function.unserialize]:
Error at offset 46 of 70 bytes inD:\wamp\apps\ECShop_2.7.3_GBK_release1106\upload\includes\cls_session.php on line 163

if(isset($session['data'])){
$GLOBALS['_SESSION'] = unserialize($session['data']);
$GLOBALS['_SESSION']['user_id'] = $session['userid'];
$GLOBALS['_SESSION']['admin_id'] = $session['adminid'];
$GLOBALS['_SESSION']['user_name'] = $session['user_name'];
$GLOBALS['_SESSION']['user_rank'] = $session['user_rank'];
$GLOBALS['_SESSION']['discount'] = $session['discount'];
$GLOBALS['_SESSION']['email'] = $session['email'];
}