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 ('2a1cefaa1ee0e1619ea49d0246b08976','0','13.58.247.231','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715825469','board.php?boardid=767&sid=2b9618acccc9c4dbfa7eb041bf49a0c2','0','0','')
mysql error: Duplicate entry '2a1cefaa1ee0e1619ea49d0246b08976' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 16.05.2024 @ 04:11
Script: /board.php?boardid=767&sid=2b9618acccc9c4dbfa7eb041bf49a0c2
Referer: http://wehrbauten.de/board.php?boardid=767&sid=2b9618acccc9c4dbfa7eb041bf49a0c2