Prepayment Invoice issue on Credit memo

Dear all,

we had made the prepayment invoice for the supplier for 150  .. later the supplier send the credit memo for this invoice which is already paid in the prepayment .

Now we need to make the another prepayment for the supplier 200 .

how to adjust the credit memo in the Payables.

I am bit confused.

My company process we pay advance to supplier and later will create the standard invoice and adjust.

Thanks

Regards,

Jinnah hackeem