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 ('0b4f6d0d46904b4b830b6f1959b11006', -1, 1711618297, 1711618297, '035abb0b', -9, 0, 0)

Line : 187
File : sessions.php