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 ('98d7d5d621be3a2c859bc701ee96e1e3', -1, 1713938211, 1713938211, '0390e996', 7, 0, 0)

Line : 187
File : sessions.php