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 ('78435611ffbd4c0ca82b6cf89b19eade', -1, 1714141669, 1714141669, '12d90852', -11, 0, 0)

Line : 187
File : sessions.php