phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO sub_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('866d42fa2660dfcd84d4ff53f9b17677', -1, 1714517381, 1714517381, '0391ab3a', -1, 0, 0)

Line : 187
File : sessions.php