AP Voucher YE Process - Efficiency Question

We have an inefficient process for YE Close in our AP team. In past years, there have been about 5-10 vouchers at YE that would need to be closed and recreated for the new Fiscal Year. With this small number it was manageable. The last fiscal year, there were over 400. We do not have a documented process or know of a functional means to roll the remaining voucher over to the next fiscal year.

We are looking for an efficient process that will allow rolling/moving the voucher from the previous fiscal year to the new fiscal year. Closing and recreating the voucher is too inefficient and not manageable any more.