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: 20.01.2019 @ 09:45
Script: /profile.php?userid=2078&sid=fe71767619140d4c6fee4fb927b5f779
Referer: