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 ('3f5d705450645eb56dcd14234c8eca99','0','3.20.235.88','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715718187','board.php?boardid=47&sid=e6ea350c026b24d1aa033cecd481b9fc','0','0','')
mysql error: Duplicate entry '3f5d705450645eb56dcd14234c8eca99' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 14.05.2024 @ 22:23
Script: /board.php?boardid=47&sid=e6ea350c026b24d1aa033cecd481b9fc
Referer: http://wehrbauten.de/board.php?boardid=47&sid=e6ea350c026b24d1aa033cecd481b9fc