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 ('8aee6f852e2c3211d54d66d6223fb3fe', -1, 1714813792, 1714813792, '340e541d', 3, 0, 0)

Line : 187
File : sessions.php