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 ('b4ec9f4865d57b0c4c83fbd5acc80d0f','0','18.118.137.243','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1714027205','report.php?postid=59690&sid=b6aff0faf29ca13362ae3f4e9ef6bee3','0','0','')
mysql error: Duplicate entry 'b4ec9f4865d57b0c4c83fbd5acc80d0f' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.7.42-log
php version: 5.6.40
Date: 25.04.2024 @ 08:40
Script: /report.php?postid=59690&sid=b6aff0faf29ca13362ae3f4e9ef6bee3
Referer: