How to do New York Income Allocation for retnals

I own a rental property in New York and there is a loss (e.g. -5000). So I think in federal, it shows as 0 income. 

I don't live in NY. When I do my state returns for my non-resident state (NY), I see "Federal Income - Rental, Royalties, Partnership" is 0. In this case do I need to report the -5000 in "New York Source Portion"?  Or put "0" ?

Thanks!