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 ('7c204d7fdc6a01b6eb517693b644db19', -1, 1730421484, 1730421484, '03912f82', 9, 0, 0)

Line : 195
File : sessions.php