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 ('3aeb5eef442ee9c2831c8c2b413c079a', -1, 1714180147, 1714180147, '12df861d', 4, 0, '0', '0')

Line : 175
File : sessions.php