phpBB : Critical Error

Error creating new session

DEBUG MODE

SQL Error : 1062 Duplicate entry '-1' for key 'session_user_id'

INSERT INTO sessions (session_id, session_user_id, session_start, session_time, session_ip, session_page, session_logged_in, session_admin) VALUES ('4eb749e9356d07d8a7341e5b3c2fccf5', -1, 1715303467, 1715303467, '12dd5521', -6, 0, 0)

Line : 189
File : sessions.php