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 ('c02b366a8e3f1425fb901c86807e0808', -1, 1713934148, 1713934148, '0390549b', 3, 0, 0)

Line : 187
File : sessions.php