How do I structure my tables and relationships in this scenario

Question

I have 2 tables that are related using a junction table. Tbl_Items is basic information needed to create an internal "stock number" and to record info about what asset it came from. The Listings table records all the information from the listing once it is created

The current simplified tables are as follows:

Tbl_Items

ID_Items PK - AutoNumber	Category Short Text	Item number Short Text	Short_Description Short Text	Asset Short Text
979	Motorcycle	0123456789	Kawasaki Vulcan VN 750 87-06 OEM Center Stand 34011-1126	16 - Kawasaki 1993 Vulcan 750 - VN750 -

Tbl_Listings

ID_Listings PK - AutoNumber	ID_Items Number	Item number Short Text	Title Short Text	Start price Currency	Start date Date/Time Extended	Make Short Text	Model Short Text	Part Number Short Text
1243	979	0123456789	Kawasaki Vulcan VN 750 87-06 OEM Center Stand 34011-1126	$49.00	Aug-25-22 11:24:30 PDT	Kawasaki	Vulcan	34011-1126

Tbl_Import_Active_Listings

Item number Short Text	Title Short Text	Start price Number	Start date Short Text	Make Short Text	Model Short Text	Part Number Short Text
0123456789	Kawasaki Vulcan VN 750 87-06 OEM Center Stand 34011-1126	49	Aug-25-22 11:24:30 PDT	Kawasaki	Vulcan	34011-1126

The current work flow is as follows

• Manually entry of the Item
• Create listing with provider tools and post it live. A unique item number is created by the provider at that point
• Manually enter the item number into the Items table and the Listings table
• Finally, manually enter the lisiting details back into the listings table

At the moment step 3 is limited in detail because of the time it takes. But capturing all of the listing data is important to streamline future listings.

I was advised to use a junction table and remove the Item Number from the Items table to not only prevent duplicate data in tables, but to prepare for a time where a many to many relationship would likely exsist between Items and Listings.

To test this I created the following junction table and removed the Item_Number from the Items table

Tbl_Junction_Items_Listings

ID_Items PK	ID_Listings PK
Joined On	Joined On
Tbl_Items.ID_Items	Tbl_Listings.ID_Listings

I'm not sure the junction table is appropriate in this case because as I see it there is really only a one to many relationship between Items (one) and Listings (many)

Ultimately I need to know if I'm missing something about the need for the junction table.

Most importanly, if I do need the Junction table, then how do I associate the listing back to the item when importing if I don't keep the item number is both tables

UPDATES:

I also have an Orders table which does require a many to many relationship with the Listings table. Would that be the reason it was suggested to use one for listings and items?

An Item can have multiple Listings when they are listed with multiple providers.

Consequently the Item Number for each listing will be different for each provider. That's why I'm not sure how to match them up when I import them at day end