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 ('57cc882ab742ab8e3454c45e13fb96c6', -1, 1714517309, 1714517309, '03155d2c', -4, 0, 0)

Line : 187
File : sessions.php