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 ('a85a9ecf88f2bf0c0ef739e43ccf7abc','0','18.225.149.136','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1716309018','register.php?sid=b2eb0868377a1ca48605fc0756e21096','0','0','')
mysql error: Duplicate entry 'a85a9ecf88f2bf0c0ef739e43ccf7abc' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 21.05.2024 @ 18:30
Script: /register.php?sid=b2eb0868377a1ca48605fc0756e21096
Referer: