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 ('4251519a68c5778f8445e034db14104a','0','3.19.27.178','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714896663','board.php?boardid=698&sid=4fad7174d342d49b02b063cdf7131260','0','0','')
mysql error: Duplicate entry '4251519a68c5778f8445e034db14104a' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 05.05.2024 @ 10:11
Script: /board.php?boardid=698&sid=4fad7174d342d49b02b063cdf7131260
Referer: http://wehrbauten.de/board.php?boardid=698&sid=4fad7174d342d49b02b063cdf7131260