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 ('a7e614de06f3300d7876085edf1e6844','0','18.221.98.71','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715160544','board.php?boardid=737&sid=035f8ab18d84797a6f5b48f28205b376','0','0','')
mysql error: Duplicate entry 'a7e614de06f3300d7876085edf1e6844' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 08.05.2024 @ 11:29
Script: /board.php?boardid=737&sid=035f8ab18d84797a6f5b48f28205b376
Referer: http://wehrbauten.de/board.php?boardid=737&sid=035f8ab18d84797a6f5b48f28205b376