SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): Invalid SQL: INSERT INTO bb1_user2awards (userid, awardid, autoawardid, beschreibung) VALUES ('20', '26', '1', 'Dieser User hat die meisten Postings bisher geschrieben - Gratulation')
mysql error: Duplicate entry '20-26-1' for key 'PRIMARY'
mysql error number: 1062
mysql version: 10.3.39-MariaDB-0+deb10u2
php version: 5.6.40-0+deb8u12
Date: 28.05.2024 @ 09:21
Script: /login.php?sid=d342582a3b32f9f7fa05c29d7be785af
Referer: