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 ('d527aaf93a3ee7c7e3a7a4f86ec01efc','0','18.118.193.123','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715842226','newthread.php?boardid=15&sid=a978440b46d514fc73e52aea41cd313d','0','0','')
mysql error: Duplicate entry 'd527aaf93a3ee7c7e3a7a4f86ec01efc' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.5.62-0+deb8u1
php version: 5.6.40-0+deb8u12
Date: 16.05.2024 @ 08:50
Script: /board/newthread.php?boardid=15&sid=a978440b46d514fc73e52aea41cd313d
Referer: