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 ('b4c2c8c43e755af6d4d3fe1a5e4ed9c9','0','3.22.71.110','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715738237','board.php?boardid=513&sid=341c83bc1abfe759c32f317cfe57f159','0','0','')
mysql error: Duplicate entry 'b4c2c8c43e755af6d4d3fe1a5e4ed9c9' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 15.05.2024 @ 03:57
Script: /board.php?boardid=513&sid=341c83bc1abfe759c32f317cfe57f159
Referer: http://wehrbauten.de/board.php?boardid=513&sid=341c83bc1abfe759c32f317cfe57f159