ER Diagram Entity without attribute
<p>I have designed an er-diagram and have an entity without any attributes. I need this entity (Item) to create a many-to-many relationshop but I guess there is a way to make this more efficient and getting rid of the entity without attributes.</p>

<p>ER DIAGRAM:</p>

<p><a href="https://i.stack.imgur.com/rvUcP.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/rvUcP.png" alt="enter image description here"></a></p>

<p>Thanks</p>