I believe it's the one they gave to Warner and Burr in the Senate Intel. Comm. which was later given to Ali at NYT's by the head of security of the committee. Which I think is why the exact dates on the FISA were redacted. This way you can find out where the leak came from. Just a theory but I guess we'll find out soon enough
Just seemed weird that only the exact dates were redacted in the one recently released, when the dates were already given in footnotes in a letter from Grassley to the IG
https://www.grassley.senate.gov/sites/default/files/judiciary/upload/2018-02-28%20CEG%20LG%20to%20DOJ%20OIG%20%28referral%29.pdf