SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): Invalid SQL: INSERT INTO bb1_searchinfos_hsp (userid, user, serie, format, cha, erw, tier, syn, buch, reg, ton, buchv, voting, date, tags_dabei, tags_nichtdabei, anz, direct, searchdate) VALUES (0, 'guest', 'ben, bib, but, dda, ddf, eig, ele, ffr, gru, hun, kir, lbf, pum, tkk, wen, ', 'adv, bil, ddr, emi, eng, fin, gng, h80, hrb, hse, hsp, hsz, khs, kin, ldz, liv, min, pla, rad, re1, son, sou, spe, st1, st2, st3, st4, st5, st6, tse, xma, ', '', '', '', '', '', '', '|Fritz Killermann;Heiko R��sse', '', '0 bis 10', '-315622800 bis 1679954400', '', '', '0', '1', '1680017105')
mysql error: Incorrect string value: '\xEF\xBF\xBD\xEF\xBF\xBD...' for column `web4001_hsppar`.`bb1_searchinfos_hsp`.`ton` at row 1
mysql error number: 1366
mysql version: 10.5.18-MariaDB-0+deb11u1-log
php version: 5.6.40
Date: 28.03.2023 @ 17:25
Script: /hoerspiele.php?action=search&ton=Fritz%20Killermann;Heiko%20R%EF%BF%BD%EF%BF%BDsse
Referer: