how to remove UUID during save file?

[![enter image description here][1]][1]I am trying to use print js library in my demo application. I am following below url

https://printjs.crabbly.com/ (here there is some example + documentation ).

I am facing one issue in my demo application same in example also. when I am clicking print .It open in print window but when we try to save that file it come with UUID **"cdcb9d0d-d8ce-4790-9403-a4c7690df5ff"**

steps to reproduce this

1. Go to https://printjs.crabbly.com/
2. Click First example . it will open print window. Don't print
3. Try to save this file . it will show **uuid** why ?

**Code**

Print PDF

[![enter image description here][2]][2]

[1]: https://i.stack.imgur.com/NESka.png
[2]: https://i.stack.imgur.com/1tlR3.jpg