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 ('787f9d76e47189ca5bdf726f2045d9f5','0','18.224.29.112','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715879093','board.php?boardid=345&page=1&daysprune=1000&sortfield=starter&sortorder=ASC&sid=1cbcce695d6355f8803dfc44467180b9','0','0','')
mysql error: Duplicate entry '787f9d76e47189ca5bdf726f2045d9f5' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 16.05.2024 @ 19:04
Script: /board.php?boardid=345&page=1&daysprune=1000&sortfield=starter&sortorder=ASC&sid=1cbcce695d6355f8803dfc44467180b9
Referer: http://wehrbauten.de/board.php?boardid=345&page=1&daysprune=1000&sortfield=starter&sortorder=ASC&sid=1cbcce695d6355f8803dfc44467180b9