phpBB : Critical Error

Error creating new session : session_begin

DEBUG MODE

SQL Error : 1062 Duplicate entry '6854fe3f3dec2ebc1c173bf9cd1dd9ec' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('6854fe3f3dec2ebc1c173bf9cd1dd9ec', -1, 1715896988, 1715896988, '00000000', 0, 0)

Line : 158
File : /www/htdocs/w0063aaa/Dermion/phpBB2/includes/sessions.php