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 ('d7a6a9afaa47214a500de7e0398ceca1','0','3.145.46.18','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715628972','board.php?boardid=221&sid=e3ab9e16b80257d54dc9c869c6c034e1','0','0','')
mysql error: Duplicate entry 'd7a6a9afaa47214a500de7e0398ceca1' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 13.05.2024 @ 21:36
Script: /board.php?boardid=221&sid=e3ab9e16b80257d54dc9c869c6c034e1
Referer: http://wehrbauten.de/board.php?boardid=221&sid=e3ab9e16b80257d54dc9c869c6c034e1