Find particle by tag and deactivate

In my game I have several checkpoints each with a particle emitter. I want to disable all the particles and then enable the current one. Every particle emitter has the same tag, which I want to use to find and deactivate all - then enable the current one. But this code isn't working:

 checkpointParticles = GameObject.FindGameObjectsWithTag("CheckpointParticles");
         
 for (var checkpointParticle in checkpointParticles){ 
     particleSystemToDeactivate = checkpointParticle.GetComponent(ParticleSystem);
     particleSystemToDeactivate.enableEmission = false;
 }

The error I get is: There is no 'ParticleSystem' attached to the "SparkleParticles" game object, but a script is trying to access it.

But I know that this isn't true. The tagged object "SparkleParticles" has an Ellipsoid particle Emitter, a particle animator and a particle renderer.