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) VALUES ('5107feed6f08e9a401f7d7f81f1e219a', -1, 1714647529, 1714647529, '1276ab14', -4, 0)

Line : 158
File : sessions.php