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 ('33646ff012f8a2b7b09a56f6df2dea2e', -1, 1752134356, 1752134356, 'd849d8bf', 39, 0, 0)

Line : 190
File : sessions.php