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 ('69cc6201c084ce1909f8132a4df2f9b4', -1, 1713853793, 1713853793, '12745a8d', -7, 0, 0)

Line : 187
File : sessions.php