Why is bad. I didnt say I will stuff myself after 2 months, I will just remove calorie deficit from my diet - I wont stop exercising, I actually want to regain

Why is bad. I didnt say I will stuff myself after 2 months, I will just remove calorie deficit from my diet - I wont stop exercising, I actually want to regain some body mass as muscles - so I need to stop deficit and make surplus of protein etc...