phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry 'b4b8bffb6adad41299318e97df3eab66' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('b4b8bffb6adad41299318e97df3eab66', -1, 1770428292, 1770428292, 'd849d802', 7, 0)

Line : 180
File : /www/includes/sessions.php