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 ('bc8fa980fe5372916a4bb70e8ed0f51a','0','3.129.247.196','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715006664','thread.php?threadid=521&threadview=0&hilight=&hilightuser=0&sid=fcf85d90aa0b682adb2a30d6e9a2370e','0','0','')
mysql error: Duplicate entry 'bc8fa980fe5372916a4bb70e8ed0f51a' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.6.13
php version: 7.4.33
Date: 06.05.2024 @ 16:44
Script: /thread.php?threadid=521&threadview=0&hilight=&hilightuser=0&sid=fcf85d90aa0b682adb2a30d6e9a2370e
Referer: