Setting SEASON up prior to FISCAL year

I was notified that there was no current data in the TR_BATCH_PERIOD table. Through researching the forums, II found a helpful script and a report from a earlier post that would enter this info - however - in reading the doc TR_SEASON_SETUP, page 6 clearly states: NOTE> Fiscal years should be set up before or at the same time as seasons.

Our seasons were set up back in December of last year, and we have had many updates and changes since.  What ramifications will there be if I now try to setup the fiscal year?

Thanks everyone...