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 ('a90a7e125467ef1ab10c3a7af18bfb5e','0','3.16.137.108','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715701510','usercp.php?action=buddy&add=1&sid=4f90ba1b7cb710cfced3c8ae3bd2bc1e','0','0','')
mysql error: Duplicate entry 'a90a7e125467ef1ab10c3a7af18bfb5e' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 14.05.2024 @ 17:45
Script: /usercp.php?action=buddy&add=1&sid=4f90ba1b7cb710cfced3c8ae3bd2bc1e
Referer: http://wehrbauten.de/usercp.php?action=buddy&add=1&sid=4f90ba1b7cb710cfced3c8ae3bd2bc1e