I’m new to game db design and struggling how to make a inventory system.

I found two options to design inventory db.

1. user-inventory-item 1:N-M:1 system

For user it’s like this

User

----------

id

level

experience

Inventory

----------
user_id

item_id

quantity

Item

----------
id

item_name

item_type

inventory has user_id and item_id and the relation is like 1:N and M:1.
But It’s quite strange to have a user a lot of inventories.
It will make a lot of inventories when each item goes in the inventory db.

2. user-inventory-item-item_dictionary 1:1-1:M-1:1 system

User

----------

id

level

experience

Inventory

----------
user_id

Item

----------
id

inventory_id

item_dict_id

quantity

Item Dict

----------
id

item_name

item_type

So I thought user and inventories relations are has_one and inventories and items are has_many.
And itemDictionary has to be one to one with item.

So my question is what design is more better?
Or is there a another design that is usually used?
I’m quite confused with designing inventory db.

Thanks for reading my question.