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) VALUES ('f1a9a17b03b9a289aad1e8360b2ecad4', -1, 1714783864, 1714783864, '0d3a7983', 20, 0)

Line : 158
File : sessions.php