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 ('e88369b0ccdb5ea04e9072f2cd4d803e', -1, 1713481282, 1713481282, '340e820d', -4, 0, 0)

Line : 187
File : sessions.php