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 ('b998a4df2235c8c9b75f1b44ff9bc0ab', -1, 1713570954, 1713570954, '0381d357', 0, 0, 0)

Line : 187
File : sessions.php