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 ('992f7c1fed33753c8b1d3a51a9a1c5b2', -1, 1714040181, 1714040181, '12bc6c36', 0, 0, 0)

Line : 187
File : sessions.php