Why can't I delete a word I posted in my previous comment?

I posted a comment on the Where Are you Again thread and then tried to delete one word but I keep getting a message... it doesn't allow me to to it.. Why is that?

This is where I posted the comment...

Where Are You Continues, Again.....

And this is the message I keep getting when I try to save the change.



I posted another comment asking the mods what was going on but got no response so far. Thanks.

 

Yes.. I believe that's what caused it.. Thanks!

 

Will do... will let you know... thanks.

 

Well... I just tried again and it still does the same..

 

Ok.. it would be nice to know what is causing it... because something like that happened last year but I ignored...
For now, if you can, please delete the word "private"... Thank you!!