Hey,

It's usually written to fill the declaration correctly without any error. In your case if there is time then I will suggest you to contact the exam conducting body and ask them about the problem that you have done. I am sure they will help you with a solution.

If the deadline is close and they are not replying I will suggest you to refill the form again as it is better to refill rather to waste a year.

Hope that helps.

Thank you.