Blend chopped dates with hot water until smooth.
In a mixing bowl, beat cream cheese and date paste until smooth.
Add brown sugar, sour cream, vanilla extract, eggs, flour, and salt. Mix until combined.
Pour filling over crust and tap gently to release air bubbles.
Bake in a water bath at 325°F for 50-55 minutes, until edges are set but center is slightly jiggly.
Cool in the oven with the door cracked, then refrigerate for at least 4 hours or overnight.