SQL-DATABASE ERROR

Database error in WoltLab Burning Board (): Link-ID == false, connect failed
mysql error: Host '1blu' is blocked because of many connection errors; unblock with 'mysqladmin flush-hosts'
mysql error number: 1129
mysql version: unknown
php version: 5.3.29
Date: 19.01.2019 @ 04:48
Script: /board.php?boardid=22&daysprune=1000&sortfield=lastposttime&sortorder=DESC&sid=84dcd47218b16c639b06055c8d548ef8&page=3
Referer: