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 ('a3c1e4afd0817176c7a50da323a88ade','0','18.217.228.35','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715455084','jgs_portal.php?sid=64554bbaba35d49a7f6aa2d3927028d9','0','0','')
mysql error: Duplicate entry 'a3c1e4afd0817176c7a50da323a88ade' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 11.05.2024 @ 21:18
Script: /jgs_portal.php?sid=64554bbaba35d49a7f6aa2d3927028d9
Referer: http://wehrbauten.de/jgs_portal.php?sid=64554bbaba35d49a7f6aa2d3927028d9