phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '51d739f226f2aa9ae379d1165e0bdb51' for key 'PRIMARY'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in) VALUES ('51d739f226f2aa9ae379d1165e0bdb51', -1, 1768462723, 1768462723, 'd849d8a4', -9, 0)

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