Remove element inside PDEForm

Hello,

I need to remove PDEelements inside my PDF. The problem is that PDEelements are nested inside a PDEForm.

I use a PDEFormGetContent to go "inside" the form and loop over the elements. I remove the elements using PDEContentRemoveElement.

The problem is that the RemoveElement doesn't affect the form, so the PDFormGetContent probabily returns a copy of the form and not its reference

Is there a way to remove some elements inside a form?

thank you