Frame work PO: Invoice Plan Limit

Hi Experts,

SAP do not allow for more than 12 months to auto populate into the invoicing plan schedule FO purchase orders. Buyers must manually enter any months past 12 months into the invoicing plan schedule manually. Some of the framework orders set-up extend up to 5 years. so extra buyer time is required to manually populate this invoicing plan schedule in the Purchase Order. can we counter this without any enhancement. please advise

Thanks

Suren