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 ('3e76d273e2a113c077cbd5f4de25e4d6', -1, 1714002045, 1714002045, '03900ccd', -4, 0, 0)

Line : 187
File : sessions.php