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 ('713bffde0ee184ed8238f36193e875bd','0','3.12.73.64','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715956829','formmail.php?threadid=1587&sid=deb82e60c04004a2147a145e518cc6fe','0','0','')
mysql error: Duplicate entry '713bffde0ee184ed8238f36193e875bd' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 17.05.2024 @ 16:40
Script: /formmail.php?threadid=1587&sid=deb82e60c04004a2147a145e518cc6fe
Referer: http://wehrbauten.de/formmail.php?threadid=1587&sid=deb82e60c04004a2147a145e518cc6fe