Error: Failed to destroy actor:

[RaidenCHEN]

I created a custom sensor which not actually sensor and serialize data but do some other work. I found that I could not destroy it, no matter I call command execution from Python script or directly call Destroy() in UE. The following are the result when I try to destroy it:
[387]LogCarla: CarlaServer destroy_actor 24
[387]LogCarla: UActorDispatcher::Destroying actor: 'sensor.other.spray_decal' 4e503730
[387]LogCarla: SprayDecalSensor_0
[387]LogCarla: Error: Failed to destroy actor: 'sensor.other.spray_decal'
[387]LogCarlaServer: Responding error: internal error: unable to destroy actor

And if I directly call Destroy() in UE, nothing happens.