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 ('ac8e7a658675c38b9ff134d41278c7c2','0','18.191.181.231','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714066021','thread.php?threadid=7725&threadview=0&hilight=&hilightuser=0&sid=f6945dd58be9a8d3250cf44c8a17d335','0','0','')
mysql error: Duplicate entry 'ac8e7a658675c38b9ff134d41278c7c2' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 25.04.2024 @ 19:27
Script: /thread.php?threadid=7725&threadview=0&hilight=&hilightuser=0&sid=f6945dd58be9a8d3250cf44c8a17d335
Referer: