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 ('800cabc469ab9a55dab77ee4c03b184f', -1, 1747764783, 1747764783, '340e969b', 2, 0, 0)

Line : 190
File : sessions.php