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 ('86f40204ba3d942fc2a1a2fa1d6ea928','0','18.225.31.159','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714719461','board.php?boardid=225&sid=4242282b009621f937dfa7c028dc81c1','0','0','')
mysql error: Duplicate entry '86f40204ba3d942fc2a1a2fa1d6ea928' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 03.05.2024 @ 08:57
Script: /board.php?boardid=225&sid=4242282b009621f937dfa7c028dc81c1
Referer: http://wehrbauten.de/board.php?boardid=225&sid=4242282b009621f937dfa7c028dc81c1