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 ('4cff90b881351f1df43cd63752a0e65e', -1, 1730421164, 1730421164, '12e2baac', -1280, 0, 0)

Line : 195
File : sessions.php