Sales order credit note

Hi 

We have created sales credit note with wrong date and invoiced and voucher got generated.

But now my requirement is need to change the invoice and voucher dates.

Eg :- I have created sales credit note on 10 Sep 2018 now I want to change it back to 1st Sep 2018 for Both invoice date and voucher.

Can any one suggest me proper way to do it in technical or functional.

Regards,

KVNKK