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 ('e9a8bcd0a9eb2832c8e4102ae1dec205', -1, 1730418626, 1730418626, '12754a29', 20, 0, 0)

Line : 195
File : sessions.php