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 ('464bcce873289b833f1207a37c9f2cd5', -1, 1714024098, 1714024098, '03886140', 2, 0, 0)

Line : 187
File : sessions.php