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 ('51fa4fea18eb43547bb43975034c4d4a','0','18.224.149.242','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714798546','jgs_portal.php?sid=6dd0643dd9712ef065f8bf516509ca82','0','0','')
mysql error: Duplicate entry '51fa4fea18eb43547bb43975034c4d4a' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 04.05.2024 @ 06:55
Script: /jgs_portal.php?sid=6dd0643dd9712ef065f8bf516509ca82
Referer: