phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('f17902a37b6f91a0d96b9cd9ec709a57', -1, 1730460740, 1730460740, '12742438', -1, 0, 0)

Line : 195
File : sessions.php