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 ('1e470b2b11f14cd1b4a81b5a4baf91c9', -1, 1752630546, 1752630546, 'd849d890', -4, 0, 0)

Line : 189
File : sessions.php