phpBB by Przemo : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 2

INSERT INTO phpbb_sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('428008315d2129d6870d1dd918ecb1e0', -1, 1746783776, 1746783776, '12ddacc5', -4, 0, 0)

Line : 443
File : sessions.php