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 ('1235cff5c13dab50feebf5f3df8e4eca','0','3.143.218.146','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714469924','board.php?boardid=543&sid=7bcdca8c8b06e4ced205a2bc67f9b9dc','0','0','')
mysql error: Duplicate entry '1235cff5c13dab50feebf5f3df8e4eca' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 30.04.2024 @ 11:38
Script: /board.php?boardid=543&sid=7bcdca8c8b06e4ced205a2bc67f9b9dc
Referer: http://wehrbauten.de/board.php?boardid=543&sid=7bcdca8c8b06e4ced205a2bc67f9b9dc