"not in scope" in "My Watches" while debugging

I have this table CelulaAux that is declared local CelulaAux at the beginning of the script.
I want to watch its content.
While debugging, I can watch it only pointing the mouse over its name:

But if I add it to “my watches”, I get “not in scope”:

Why, if at the same time I can see its content using the mouse over the name, but I can’t see it in “my watches”?

How can I watch this table?