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 ('3706060170f68c376c242797a777fbdf', -1, 1730420044, 1730420044, '12777958', -9, 0, 0)

Line : 195
File : sessions.php