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 ('547cd9840726b69b4b869f3b5bf4640e', -1, 1747611537, 1747611537, 'd849d867', 42, 0, 0)

Line : 190
File : sessions.php