I can't introduce data in the form with attribute defined.
I have added attributes in "Product" dimension:

I have created "TIPODATO" attribute, with these values: Unidades (units) and Importes (amount).

I have created a form. I want to introduce units and amount by account and product:

In the view, I can't write:

If I delete the atrribute in the row, I can write:

What action am I doing wrong in using attributes?