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 ('2c46b5a5120caa1e492b1a46d0229f6f', -1, 1730422744, 1730422744, '12bfed83', -9, 0, 0)

Line : 195
File : sessions.php