phpBB : Critical Error

Error creating new session

DEBUG MODE

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

INSERT INTO cantautore_phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin, is_robot) VALUES ('9aed6250c3028a8207d10e4a291d4d8e', -1, 1713496818, 1713496818, '340e554c', 5, 0, '0', '0')

Line : 175
File : sessions.php