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 ('5267f1cac02727b78c5a5dd15cbb21c3', -1, 1714010060, 1714010060, '2cc961e0', -7, 0, 0)

Line : 187
File : sessions.php