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 ('b31be3f230a8a958c2f5cdc69fba5e10','0','3.143.253.76','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715659925','board.php?boardid=214&sid=a0a17d9afd755d79fbb7bb46b5b60c54','0','0','')
mysql error: Duplicate entry 'b31be3f230a8a958c2f5cdc69fba5e10' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 14.05.2024 @ 06:12
Script: /board.php?boardid=214&sid=a0a17d9afd755d79fbb7bb46b5b60c54
Referer: http://wehrbauten.de/board.php?boardid=214&sid=a0a17d9afd755d79fbb7bb46b5b60c54