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 ('2903f16079dc819b1e47b537a6f76618', -1, 1752896459, 1752896459, 'd849d8ba', -4, 0, 0)

Line : 190
File : sessions.php