How many Prepayments can be matched with a single invoice?

We have multiple invoices applied against a single prepayment and since the business is a Retail, suppliers tend to invoice branches independently. We currently have some prepayments with 140+ invoices applied against a prepayment and we're unable to apply new ones because we're getting the following error: "This action isn't applicable for the invoice in its current state."

We need to know what is the maximum number of invoices that can be applied against a prepayment?

Thanks!