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 ('cf123d5f9249b158b676ed1b457600fe', -1, 1713973675, 1713973675, '340f3f91', -9, 0, 0)

Line : 187
File : sessions.php