problem bei db spalte löschen

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$del = removeFromlist($info[$wbbuserdata['userid']]['acceptbuddylist'] , $data);
    if($del == "-1") $del = ''

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/** buddy list **/
if ($action == 'buddy_list' or $action == 'accept_buddy' or  $action == 'delaccept_buddy') {
    $lang->load('MEMBERS');

    if (isset($_POST['send'])) {
        $userid = $db->query_first("SELECT userid, buddylist FROM bb".$n."_users WHERE username='".addslashes(wbb_trim($_POST['addtolist']))."'");
        if (!$userid['userid']) error($lang->items['LANG_USERCP_ERROR1']);
        elseif ($userid['userid'] == $wbbuserdata['userid']) error($lang->items['LANG_USERCP_ERROR2']);
        else {
            $buddylist = add2list($userid['acceptbuddylist'], $wbbuserdata['userid']);
            if ($buddylist != -1) $db->query("UPDATE bb".$n."_users SET acceptbuddylist='$buddylist' WHERE userid='".$userid['userid']."'");  

header("Location: usercp.php?action=buddy_list".$SID_ARG_2ND_UN);
            exit();
        }
    }
// 
    
    if ($action == 'accept_buddy') {
    if(isset($_GET['data'])) $data = addslashes(wbb_trim($_GET['data'])); else error($lang->items['LANG_USERCP_NOBUDDYTOADD']);
    $result = $db->query("SELECT acceptbuddylist, userid, buddylist FROM bb".$n."_users WHERE userid IN ('".$wbbuserdata['userid']."','".$data."')");
    While($row = $db->fetch_array($result))
    $info[$row['userid']]= array(buddylist => $row['buddylist'], acceptbuddylist => $row[acceptbuddylist] );
    $info[$wbbuserdata['userid']]['acceptbuddylist'] = explode(" ",$info[$wbbuserdata['userid']]['acceptbuddylist']);
    if(in_array($data, $info[$wbbuserdata['userid']]['acceptbuddylist'])) {
    $add = add2list($info[$wbbuserdata['userid']]['buddylist'] , $data);
    $info['implode'] = implode(" ",  $info[$wbbuserdata['userid']]['acceptbuddylist']);
    $del = removeFromlist($info[$wbbuserdata['userid']]['acceptbuddylist'] , $data);
    if($del == "-1") $del = '';
    $buddylist = add2list($info[$data]['buddylist'], $wbbuserdata['userid']);
    $db->query("UPDATE bb".$n."_users SET buddylist='$buddylist' WHERE userid='$data'");
    $db->query("UPDATE bb".$n."_users SET buddylist='$add', acceptbuddylist='$del' WHERE userid='$wbbuserdata[userid]'");
    header("Location: usercp.php?action=buddy_list".$SID_ARG_2ND_UN);
    exit();
    } else{ error($lang->items['LANG_USERCP_NOBUDDYTOADD']);}
    }
    
    if($action == 'delaccept_buddy') {
    if(isset($_GET['data'])) $data = addslashes(wbb_trim($_GET['data'])); else error($lang->items['LANG_USERCP_NOBUDDYTOADD']);
    $del = removeFromlist($wbbuserdata['buddylist'], $data);
    if($del == "-1") $del = '';
    $db->query("UPDATE bb".$n."_users SET acceptbuddylist='$del' WHERE userid='$wbbuserdata[userid]'");
    header("Location: usercp.php?action=buddy_list".$SID_ARG_2ND_UN);
    }

    
    $listbit = '';
    $pmLink = '';
    $buddyCount=0;
    $wbb_data = $db->query_first("SELECT acceptbuddylist FROM bb".$n."_users WHERE userid='".$wbbuserdata['userid']."'");
    
    if ($wbbuserdata['buddylist'] != '' OR $wbbuserdata['acceptbuddylist'] != '') {
        
        if($wbbuserdata['acceptbuddylist']){ $acceptbuddylist = "','".$wbbuserdata['acceptbuddylist']; $explodeacceptbuddylist = explode(" 

",$wbb_data['acceptbuddylist']); }
        
        $result = $db->unbuffered_query("SELECT u.userid, u.username, IF(s.lastactivity>=".(time() - $useronlinetimeout * 

60).(($wbbuserdata['a_can_view_ghosts'] == 1) ? ("") : (" AND u.invisible=0")).",1,0) AS online FROM bb".$n."_users u
        LEFT JOIN bb".$n."_sessions s USING (userid)
        WHERE u.userid IN ('".str_replace(" ", "','", $wbbuserdata['buddylist']).str_replace(" ", "','", $acceptbuddylist)."') ORDER BY online DESC, 

u.username ASC");
        while ($row = $db->fetch_array($result)) {
            if(!@in_array($row['userid'],$explodeacceptbuddylist)) {
            $row['username'] = htmlconverter($row['username']);
            $username = $row['username'];
            if ($row['online']) $LANG_MEMBERS_USERONLINE = $lang->get("LANG_MEMBERS_USERONLINE", array('$username' => $username));
            else $LANG_MEMBERS_USERONLINE = $lang->get("LANG_MEMBERS_USEROFFLINE", array('$username' => $username));
            $pmLink .= "&userid[]=$row[userid]";
            $buddyCount++;
            eval("\$listbit .= \"".$tpl->get("usercp_buddy_listbit")."\";");}
            else eval("\$usercp_askadd .= \"".$tpl->get("usercp_askadd")."\";");
            
        }
    }

    eval("\$tpl->output(\"".$tpl->get("usercp_buddy_list")."\");");
}