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 ('d91b35ad1a6420b937fa2d17d0a9476d','0','18.223.108.105','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1716101281','formmail.php?userid=142&sid=b81796550f5dceb0e63c3cbb06b64de6','0','0','')
mysql error: Duplicate entry 'd91b35ad1a6420b937fa2d17d0a9476d' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 19.05.2024 @ 08:48
Script: /formmail.php?userid=142&sid=b81796550f5dceb0e63c3cbb06b64de6
Referer: