On Kronik Lockjaw's fourth attempt to title Durk Gothly he received the above message. Now, we don't know if Durk can go to another Guild and get more, but for now, staying where he is, isn't getting him anymore titles unless he becomes big enough to be an "Operations Assistant."
I'm going to assume, Operations Assistant is like a Viceroy in Classic Tiny Empires. and while I'm assuming, lets assume there is an "Operations Manager" too, like a Grand Viceroy in classic.
Thanks to Kronik Lockjaw for the image and information.