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 ('6877000a8e23f42935e15b9f634617ba', -1, 1730419003, 1730419003, '0393c392', -1280, 0, 0)

Line : 195
File : sessions.php