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 ('da018d601ed8e591bab392c9bb10c56e','0','18.118.1.158','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715162824','formmail.php?userid=139&sid=02fed1e5e439b8fdcf8138810d80619b','0','0','')
mysql error: Duplicate entry 'da018d601ed8e591bab392c9bb10c56e' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 08.05.2024 @ 12:07
Script: /formmail.php?userid=139&sid=02fed1e5e439b8fdcf8138810d80619b
Referer: