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 ('e7243f98de54358ea8da90cb4859f08d', -1, 1711679408, 1711679408, '36f30229', -4, 0, 0)

Line : 187
File : sessions.php