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 ('ad91196e5a1e31614e9ce1d390dd93a8','0','18.189.22.136','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714830047','board.php?boardid=136&sid=b67aa6ca99180b57e4a311155f0954d7','0','0','')
mysql error: Duplicate entry 'ad91196e5a1e31614e9ce1d390dd93a8' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 04.05.2024 @ 15:40
Script: /board.php?boardid=136&sid=b67aa6ca99180b57e4a311155f0954d7
Referer: http://wehrbauten.de/board.php?boardid=136&sid=b67aa6ca99180b57e4a311155f0954d7