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 ('93cc9f604662fb9b06ac32989c032dac', -1, 1714005295, 1714005295, '038b5217', -4, 0, 0)

Line : 187
File : sessions.php