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 ('4f14d8a1bf38a9ed66cb3d73ab30972f', -1, 1713858531, 1713858531, '340e7e4a', -4, 0, 0)

Line : 187
File : sessions.php