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 ('322a8f5fd12a61e9c872f8398baff5b8', -1, 1714605108, 1714605108, '12ddef94', -50, 0, 0)

Line : 187
File : sessions.php