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 ('750772a1df5c473036f8b45a1b203a21', -1, 1730419805, 1730419805, '12bfdfef', 19, 0, 0)

Line : 195
File : sessions.php