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 ('b4a13bbf70624e7091e199323d7d569d','0','18.220.212.186','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715581845','board.php?boardid=284&sid=ec3f6f216982c010b5da524f0dd12e6f','0','0','')
mysql error: Duplicate entry 'b4a13bbf70624e7091e199323d7d569d' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 13.05.2024 @ 08:30
Script: /board.php?boardid=284&sid=ec3f6f216982c010b5da524f0dd12e6f
Referer: