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 ('9a6959f9948f4cad25591b75f31d9a14', -1, 1714033241, 1714033241, '127551f0', -9, 0, 0)

Line : 187
File : sessions.php