Using Keyed Array Items of Session Storage

have added a KEYED ARRAY to session storage:

when trying to use this Keyed Array to store values, getting this option:

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have already looked at this: Adding Items to Session Storage Arrays
and this Working with Arrays

but neither have answers about using Keyed Array from Session Storage.

can you please guide on how this will work?

how we can add, replace, remove the key-value pairs on a Keyed Array which has been added to Session Storage.