phpBB : Critical Error

Error creating new session : session_begin

DEBUG MODE

SQL Error : 1062 Duplicate entry '2798a9508206768c6857f52b54c6f92d' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('2798a9508206768c6857f52b54c6f92d', -1, 1715706814, 1715706814, '00000000', -7, 0)

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