Hi @<1564785037834981376:profile|FrustratingBee69>

It's the previous container I've used for the task.

Notice that what you are configuring is the Default container, i.e. if the Task does not "request" a specific container, then this is what the agent will use.
On the Task itself (see Execution Tab, down below Container Image) you set the specific container for the Task. After you execute the Task on an Agent, the agent will put there the container it ended up using. This means that if you cloned a previous Task that was using the cuda-container, the cloned Task will use the same one, regardless of a diff default container