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 ('ff6197e1acc7f47e6ca7e7de98779be7', -1, 1748583185, 1748583185, '03152984', -4, 0, 0)

Line : 189
File : sessions.php