Do 2 printouts and write an explanation of both of them and sign them, hand one in when you download your driver card and keep one with you in case you get stopped in the next 28 days.
It’s obviously a mistake and no-ones going to condemn you or fine you for it 
When doing manual entries always check that the rest period has been properly recorded as rest and you’ll be fine, now you’ve done it once it will look less confusing in future 