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 ('f371ab964229027244035a594f6f3e1b','0','3.17.174.156','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715020280','board.php?boardid=438&sid=d526c18db7178c28cc733c4ec54131bc','0','0','')
mysql error: Duplicate entry 'f371ab964229027244035a594f6f3e1b' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 06.05.2024 @ 20:31
Script: /board.php?boardid=438&sid=d526c18db7178c28cc733c4ec54131bc
Referer: http://wehrbauten.de/board.php?boardid=438&sid=d526c18db7178c28cc733c4ec54131bc