Practices have lifespans. When one stops working, three things could be happening: boredom, which usually means the practice needs a small variation; avoidance, which means the practice is working and touching something; or completion, which means it has done its job and can be retired with thanks.
The test is what happens in your body when you think about doing it. Flat indifference is boredom. Slight dread is avoidance, and the practice deserves another two weeks. A quiet 'that's finished' is completion, and holding on past that point turns practice into obligation.
Retire deliberately rather than by drift. Write the date, note what it gave you, and leave a gap before starting anything new. Practices kept out of guilt teach guilt.