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 @ 00:23
Script: /thread.php?threadid=748&page=4&sid=c46bac220a1edde81a07f76ec97e75f4
Referer: