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 ('a8a33b38cc7560314525590e733f6f7c','0','3.143.4.181','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714538883','search.php?action=user&userid=559&sid=7a41642c0ce15b5767bfa2a28394e74c','0','0','')
mysql error: Duplicate entry 'a8a33b38cc7560314525590e733f6f7c' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 01.05.2024 @ 06:48
Script: /search.php?action=user&userid=559&sid=7a41642c0ce15b5767bfa2a28394e74c
Referer: