# Time dilation due to two cancelling gravitational potential?

We know that the formula for gravitational time dillation is $$T_{dilated}=\sqrt{1-\frac{2Gm}{Rc^2}} \cdot T_{without gravity}.$$ But if there are two stars (of equal mass) and an atomic clock is placed at the centere of the line which connects both star's centre of mass then the gravitational potential will be zero on the clock then does it experience gravitational time dilation relative to a clock far away from the stars?

If so then what causes it since the above formula doesn't seem to work in this case.