AWS ECS task definition : Why is my task definitions are active?

Question

I'm currently running a ec2 instance with no load balancer

intended to run single instance with no scaling

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I have only one task running but all three tasks are Active

I want to know why my all of my task definitions are activated

is it intended or just a default state?

for a backup when latest version of task crushes? or is it for quick scaling?

I can't find a clue for it Doc: Run a standalone task

Answer 1

ACTIVE simply means that you can run a task using the given version. It does not mean that the version is actually running. To make old versions INACTIVE (ie not usable) you have to deregister it.