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 ('f3ac649802e4e88a1d98ec924f41ef6a','0','18.191.181.231','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715179517','board.php?boardid=653&sid=b6276efdd208fd30c17f5b6c4aa8f954','0','0','')
mysql error: Duplicate entry 'f3ac649802e4e88a1d98ec924f41ef6a' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 08.05.2024 @ 16:45
Script: /board.php?boardid=653&sid=b6276efdd208fd30c17f5b6c4aa8f954
Referer: http://wehrbauten.de/board.php?boardid=653&sid=b6276efdd208fd30c17f5b6c4aa8f954