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 ('82c3957f257362c94d7f4473ffb1f847','0','18.223.28.70','Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.c','1715967794','board.php?boardid=21&sid=836edc83b5a1f9eef33e6157c83ff2b9','0','0','')
mysql error: Duplicate entry '82c3957f257362c94d7f4473ffb1f847' for key 'PRIMARY'
mysql error number: 1062
mysql version: 5.1.41-3ubuntu12.3
php version: 4.4.9
Date: 17.05.2024 @ 19:43
Script: /wbb2/board.php?boardid=21&sid=836edc83b5a1f9eef33e6157c83ff2b9
Referer: