Calories are wrong

Hi

I’m a new user here. I’ve had a fitbit for years and used it to track my calories and to keep my weight steady.

But my new lily2 is showing a wrong calorie burn, if I follow the burned calories from my lily then I need to eat 200 to 300 calories more during the day, which doesn’t make sense to me…

I understand that the devices are different, but such a difference cannot be correct.

 

How can I fix this?