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 ('09821d408f3a1b1c9db9f1eb4bc3f3c4', -1, 1714865425, 1714865425, '0391bca0', -1, 0, 0)

Line : 187
File : sessions.php