Accidentally exported April billing before month end

I accidentally exported my April billing to FENXT today…oops! Do I just need to reverse that journal entry in FE, and post the April billing batch again at the end of the month? I wasn't sure if TM just keeps adding to that same billing batch, so the items I exported today would get exported again at month end, or if TM creates a new April billing batch for the remainder of our April billing.