SQL-DATABASE ERROR

Database error in WoltLab Burning Board (2.3.6): Invalid SQL: INSERT INTO bb1_sessions (sessionhash,userid,ipaddress,useragent,lastactivity,request_uri,styleid,langid,authentificationcode) VALUES ('ef33848cf41b8bfada6d0260c5436482','0','18.219.35.128','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715592703','board.php?boardid=687&sid=7317b16cca2d994422ae257ef93630f5','0','0','')
mysql error: Duplicate entry 'ef33848cf41b8bfada6d0260c5436482' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 13.05.2024 @ 11:31
Script: /board.php?boardid=687&sid=7317b16cca2d994422ae257ef93630f5
Referer: http://wehrbauten.de/board.php?boardid=687&sid=7317b16cca2d994422ae257ef93630f5