phpBB : Критическая ошибка

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) VALUES ('941297a5a8aa52699e6e457538be28be', -1, 1537926944, 1537926944, '36c6670d', 0, 0)

Line : 158
File : sessions.php