Hi Nik, thank you for sharing it.
I found a simple solution, I don't know why I didn't think about it before :)
I created my template and left it there without using it.
When I want to duplicate it I just go to it, select everything (CTRL + A) copy (CTRL + C) and paste (CTRL + V) in a new whiteboard, and use it as my template
Thanks!
Easy and it solved my issue.