In a large bowl, beat cream cheese for 1 minute. Add sugar, salt, cinnamon, nutmeg, and flour, mix until completely combined and there are no lumps. Scrape down the sides of the bowl with a spatula.
With the mixer on low, add the eggs, one at a time, and beat until just mixed through, do not to over-beat. Scrape down the sides of the bowl with a spatula.
Add vanilla extract and sour cream, beat until mixed through, stopping to scrape the sides and bottom of the bowl with a spatula.
Using a measuring cup, add the cheesecake batter to the prepared pan, on top of the carrot cake batter. You can swirl it a bit also. Smooth the top with a spatula.
Transfer the cheesecake to the preheated oven and bake it for about 60-70 minutes. Or until the cheesecake is just slightly wobbly in the center, but puffy and settled on the sides.
Turn off the oven and crack open the door. Cool cheesecake completely in the open oven.
Once completely cooled remove from the oven and refrigerate for at least 5-6 hours.
Run a butter knife around the edges to release it from the pan. Store in the fridge until ready to serve.