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 ('adc16dc637bd9879f1df92e9ca187b4e','0','52.14.168.56','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714073419','thread.php?threadid=6290&sid=8dc3ecadde92f77ac5febc5526c8f8f8','0','0','')
mysql error: Duplicate entry 'adc16dc637bd9879f1df92e9ca187b4e' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 25.04.2024 @ 21:30
Script: /thread.php?threadid=6290&sid=8dc3ecadde92f77ac5febc5526c8f8f8
Referer: