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 ('438e4021552858f8e1d3156381ce2064', -1, 1749778981, 1749778981, 'd849d803', -9, 0, 0)

Line : 190
File : sessions.php