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 ('07bf3ee183b57e90cc7a93cb4fd87c89', -1, 1775212119, 1775212119, 'd849d86e', -10, 0, 0)

Line : 247
File : sessions.php