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 ('6fbe3dee37d03efa76f1c73b4ed8d4f5','0','3.145.17.20','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714959465','board.php?boardid=728&sid=00d3a65cdc505a8301ddc5c83e39a6fb','0','0','')
mysql error: Duplicate entry '6fbe3dee37d03efa76f1c73b4ed8d4f5' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 06.05.2024 @ 03:37
Script: /board.php?boardid=728&sid=00d3a65cdc505a8301ddc5c83e39a6fb
Referer: http://wehrbauten.de/board.php?boardid=728&sid=00d3a65cdc505a8301ddc5c83e39a6fb