do not save form when the filed is not completed correctly

Hi

i was create a form and publish in the Document library.

i was create a Repeating Table with two filed(Combo box and text box) and set Action Rule from that filed.This means that the user can not selected same value.

when publish it and full this field and select same value it show me error that set on the Screen Tip but I can save it!!!!!

i want if the form have error any one can not ability to save it.

what am i do?