Late Charges issue for Opening balances

Dear All,

We are going Go-Live and client is providing AR Open invoices but we have issue of late changes. For example: Client have old invoice (2007 or 2008) and they have already record late charges invoice in Legacy System and partly applied with Receipt. If I upload Invoice of 2007 or 2008, system will generate New invoice with full amount. This will increase receivable for customer but late charge invoice already created and applied with receipt.

Please suggest best workaround or solution,

Thanks