Disable Error message box ignore button

Hello All,

I have a field that has a validation rule inside. Its a date field MM/DD/YYYY format and I only want people to enter that particular format.

I noticed if i enter anything in the field other then the particular format like dafdfasdf, I get an error message: The value you entered for DateField2 is invalid. To ignore validation for DateField2, click Ignore.

I then have two button ok and ignore. Regardless which one I click the pdf will accept the error data.

My question is how to disable the ignore button and have the form not accept the error data?