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 ('e1ffba0baec8d62603b26a662cbc97df','0','18.189.170.17','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1713519657','board.php?boardid=244&sid=a306e976a73a3f5f05cf4442d04c8375','0','0','')
mysql error: Duplicate entry 'e1ffba0baec8d62603b26a662cbc97df' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 19.04.2024 @ 11:40
Script: /board.php?boardid=244&sid=a306e976a73a3f5f05cf4442d04c8375
Referer: http://wehrbauten.de/board.php?boardid=244&sid=a306e976a73a3f5f05cf4442d04c8375