'0' balance Miro passed previous years invoice has to cancel in the current year

Dear Fi Experts,

Miro invoice has posted in 2015 previous year with '0' amount.

but accounting payment has done in FI without refernce to po ,

but client wants to cancel that miro '0' balance invoice which posted in previous year

Please tell how to resolve the issue, i was trying in MR8M , its showing period is closed,

client dont want to open the past period he need to close in this current period.

thanks