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 @ 23:23
Script: /thread.php?threadid=109339&sid=a55b91407ad868639a409906c0e412bb
Referer: