1099 balances and unapplied payments

SOLVED

We have several vendors that require us to make pre-payments for PO orders. We have a few of these payments where we haven't yet received the corresponding invoice before the 1099 deadline, and we're not sure how to address them. Since no invoice has been received/applied, that remaining payment balance is not included in our 1099 totals for that vendor. Also, once the 1099 process has been run, those 2019 payment records appear to be essentially locked down and no invoices can be applied, until we "unsubmit/correct" our 1099's.

How can we deal with this issue? do we have to create a dummy transaction to apply these payments to, and then an offsetting DM to use for the invoices we'll receive later in 2020?

I would think some kind of error message should be triggered in this case, when 1099's are run saying that "there are unapplied payment balances for X vendors, all balances must be applied for 1099's to calculate properly" or something. Especially since moving forward essentially "breaks" those payment records.