check for an exact match in array (data storage)

I'm making a custom inventory system, players are able to add items to a menu and retrieve them from said menu later.
to do this, I am storing the item data in storage.
I would like to ensure that the player does not store a duplicate of an item that is already in storage
the problem /execute data does not check for exact matches, just partial matches. So, if an item {id: "minecraft:target"} has the less, but similar data to an item already in storage {id: "minecraft:target", components: {"minecraft:custom_name": "renamed"}}, then it will return that the new item already exists, even though the item is unique
Is there a way to check for an exact match in an array?
(I'm currently using macros to check the item data, execute if data namespace:storage list[$(item_data)])