How do I disable object registering in LoS behavior?

Is this possible? I might've written myself into a bit of a bind by not outright destroying objects.

I have a group of sprites all in a container. One sprite is the base and the rest are targets attached to it that get shot at by the player and AI. Destroying a target in the code will obviously destroy the entire container, so instead I marked them as destroyed using variables and animations. Problem is, this doesn't prevent targets from registering in Line of Sight behavior and other code, so AI looking at a "destroyed" target will still consider it a valid target.

Is there a way to make an object exempt from something like this?

LoS is just a condition, you can combine it with other conditions to filter out "destroyed" instances.

Target Compare instance variable Destroyed=0      ->  AI Spawn bullet ....
AI Has LoS to Target 
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First condition will pick all not destroyed targets. Second condition will check if AI has LoS to any of them.

Huh, I thought I'd tried that with no success. Seems to be working now though, maybe I just had to reshuffle the order of events. All's well that ends well.

Thanks!