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: 16.01.2019 @ 04:59
Script: /board.php?boardid=152&daysprune=1000&sortfield=topic&sortorder=DESC&sid=01a678624cb0cc4f360acc005414a39a
Referer: