client wrongly paid amount on March 30th for April1st Dated invoice...GST treatment..

Hi,

we are into Renting of immovable property services...and we do raise Advance invoices...we have raised April dated invoice in March...but one of our client by mistakely paid amount on 30th March against April dated invoice...what will be the GST adjustment on our end as it's a FY difference....

Thank
Dhanakirthi