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 ('4ce2e0b3c9cd4815c56672665a29b1f8', -1, 1713917157, 1713917157, '03926989', -7, 0, 0)

Line : 187
File : sessions.php