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 ('fef404f7854d12a6ffc897faa9449f3c','0','3.17.154.171','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714733520','profile.php?userid=12357&sid=94ca76648db191cc83cae6020f479e7f','0','0','')
mysql error: Duplicate entry 'fef404f7854d12a6ffc897faa9449f3c' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.5.62-0+deb8u1
php version: 5.6.40-0+deb8u12
Date: 03.05.2024 @ 12:52
Script: /board/profile.php?userid=12357&sid=94ca76648db191cc83cae6020f479e7f
Referer: