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 ('22c154a17bafc406b6d9835ab7fc572a', -1, 1711613636, 1711613636, '12e9dfbd', -8, 0, 0)

Line : 187
File : sessions.php