Hate to answer your question with a question, but, answering this question answers yours.
What files did you edit?
Additionally, I just searched ULib and ULX, we only use the word metadata in one XGUI file in client ULX.
However, without knowing the file you edited, that very well could just be misreading info from another file you may have corrupted.
Shutdown server, then restore the file(s) you edited.
Restart server.
From there, if it doesn't fix it, shutdown server and restore /data/ulib/bans.txt (as it might be corrupted by whatever changes you made.