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 ('3b312a83493c59c57a0ab4caf2ac296f','0','18.220.16.184','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714169542','klassenfoto_b.php?sid=5a23ae7fd79472574ff2efb28c61af19','0','0','')
mysql error: Duplicate entry '3b312a83493c59c57a0ab4caf2ac296f' for key 'PRIMARY'
mysql error number: 1062
mysql version: 10.5.19-MariaDB-0+deb11u2
php version: 5.6.40
Date: 27.04.2024 @ 00:12
Script: /schule/klassenfoto_b.php?sid=5a23ae7fd79472574ff2efb28c61af19
Referer: