Hi,
Designer warns you correctly that depending on what you allow between different signature steps signatures may become invalid. If you add more subforms after someone signed the form in one row (dynamic form, repeatable subform so possible) the signature will be invalid (the person who signed did not see the additional subform).
So you'll need to take a closer look (that's why the warning is shown) at your form (i.e, what might happen between signatures) and the signature flow (multiple signatures due to the repeating subform containing the signature field).You'll need to figure out if the "may be invalid" is actually the case.
Juergen
