SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): Invalid SQL: INSERT INTO bb1_searchinfos_hsp_easy (userid, user, search, typ, direct, anz, searchdate) VALUES ('0', 'guest', 'Soňa Červená', 'Synchronsprecher', '1', '1', '1792778519')
mysql error: Incorrect string value: '\xC5\x88a \xC4\x8C...' for column `web4000207_hp`.`bb1_searchinfos_hsp_easy`.`search` at row 1
mysql error number: 1366
mysql version: 11.8.6-MariaDB-0+deb13u1 from Debian-log
php version: 8.5.12
Date: 23.10.2026 @ 20:01
Script: /hoerspiele.php?action=easysearch_result&syn=So%C5%88a+%C4%8Cerven%C3%A1
Referer: