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 ('0999c7f6e3d948fba749f77c09b43a5c', -1, 1714608653, 1714608653, '0315e929', -4, 0, 0)

Line : 187
File : sessions.php