Maybe cause it says "poop" in it? Game filters are odd that way, I am probably wrong tho. That is the only thing I can spy in the name that would have given issues in other games I play. People would often use spaces or other means to use bad words, so the filter system started removing the edited ones as well. (again I am probably wrong...it is just the only thing I can think of...).

I have no clue why it will not let you otherwise XD.