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 ('3121a3e59171c0a6f27599efc54616bc','0','18.221.92.170','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715805663','thread.php?threadid=3968&sid=a2dfb1914c463780f58025aa6be2673a','0','0','')
mysql error: Duplicate entry '3121a3e59171c0a6f27599efc54616bc' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 15.05.2024 @ 22:41
Script: /thread.php?threadid=3968&sid=a2dfb1914c463780f58025aa6be2673a
Referer: