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 ('f0472239f499c7bfb17501208394c3f0','0','18.225.31.159','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714854636','board.php?boardid=354&sid=a603e912f8112885d0f128cf1ab96912','0','0','')
mysql error: Duplicate entry 'f0472239f499c7bfb17501208394c3f0' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 04.05.2024 @ 22:30
Script: /board.php?boardid=354&sid=a603e912f8112885d0f128cf1ab96912
Referer: http://wehrbauten.de/board.php?boardid=354&sid=a603e912f8112885d0f128cf1ab96912