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 ('743d57e3085311d1df405c0b626e5d13', -1, 1714607379, 1714607379, '0d3a7983', -50, 0, 0)

Line : 187
File : sessions.php