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 ('621e6f373a14ab6d8f85f99a1db876f1', -1, 1726882253, 1726882253, '12dfed1d', -4, 0, 0)

Line : 189
File : sessions.php