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 ('dfcd0491b728761f0ada82c1d1a9cb09', -1, 1711657209, 1711657209, '2cc5725c', -4, 0, 0)

Line : 187
File : sessions.php