Skip mandatory subform field when editing Zoho Form

Skip mandatory subform field when editing Zoho Form

Hi,

We have a mandatory subform field in a Zoho Forms that users must complete when submitting the form.

When they update the form, the subform fields do not prepopulate as the main fields do, so they are forced to
re-enter the subform field information in order to advance to the next page and continue updating the form.

I do not see any field or form rules that apply to subforms. 

How can a user skip the mandatory subform field to edit the completed form?

Thanks,

Jason