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 ('b1f99ce53ce2a0e1b2f4ff09e1f9e42e', -1, 1713936947, 1713936947, '12bfd342', -1, 0, 0)

Line : 187
File : sessions.php