How to mutate an array's value in "each" helper in Ember JS (Octane)

I have an array of strings passed as an argument to a component, inside the component I am using "each" helper to render each string in a text input. I tried the following approach.

MainComponent.hbs
<Component @model=/>

//Eg: model.list = ["Jack", "Sparrow"];

Component.hbs
<div>
    
    <div>           
         <PaperInput @value= 
            @placeholder="Enter a Name"
            @onChange=/>        
    </div>
    
</div>

I am running into the error "Uncaught (in promise) Error: Assertion Failed: You can only pass a path to mut". Would really appreciate if anyone can let me know What's going wrong here.