Staff Block Glitch

[Fysez]

So I came across a pretty bad glitch.
I've placed all around the Gmap, A ton of Staff Blocks with chat on them telling me what i'm going to need to add. They are everywhere.

Little did I know, Updating Staff Blocks would make it so i cannot delete them either. The only thing I changed was chat, So it had nothing to do with deleting them. I'm unable to delete any of these staff blocks what-so-ever.
Help?! It's pretty bad