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 ('896a46733e15163d7439d3f4d99812d6', -1, 1711627208, 1711627208, '36a5f8d4', -4, 0, 0)

Line : 187
File : sessions.php