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 ('16dc6c46787e8f9a8240d5fa51828f32', -1, 1752134704, 1752134704, 'd849d8bf', -8, 0, 0)

Line : 190
File : sessions.php