Ok I will try again but I think ID check doesn't work. 

Importing my XML with one item with an ID:

First manual run : post created

Second manual run : second post created, not updated 

It should be updated, not created 

Yes, it is. But you don’t need to use it. Plugin automatically detects
duplicate by title

OK, I will make this.

Can you confirm me the ID field :

It's used to check if a post exist no ?

If first time : post created

second time : updated

So if two items have the same SKU :

first occur : creation

Second : updates : So two offers will merge  to the first post ?

I'm right ?

currently, it's not clear what you do

Please, create topic according to guidelines, with all information, links, screenshots. This will allow us to understand your issue and give you a better and fast answer. 

https://sizamtheme.support-hub.io/articles/how-to-write-to-support-if-you-need-technical-help

I'm using importWPID like a SKU. 

I'm using this because I have this error :

yesterday I was using WP all import.

So I switched to importWP.

This morning, I had new items in my XML file.

Looking the history : 

Only updates and duplicates.

No new items...

In your video you say : we can check duplicates with title ( default ) and ID : duplicates and merge different prices from different merchands for the same product.

That's why I try this.

it's not clear what is importWPID and why you added it. Duplicates is detected automatically based on title of post

Hello,

For trying, I have a remote XML file with only one "item" : 

<item>

<title>QIDI TECH Large Intelligent Industrial</title>

<description> <h2 class="goodsDescribe_title"> Commentaires de Vidéos Youtube </h2> <h2 class="goodsDescribe_title"> Descriptions </h2> <section class="platformGoodsDesc js-platformGoodsDesc"> <p class="textDescTitle">Principales Caractérisques</p> <p class="textDescContent">Extrudeuse Simple avec ...... </description>

<link>https://fr.gearbest.com/3d-printers--39</link>

<image>https://gloimg.gbtcdn.com/storage/image>

<price>1061.65</price>

<tags>QIDI,Imprimante 3d</tags>

<short-description>Commentaires de Vidéos Youtube Descriptions</short-description>

[.....]

<importWPID>1605884254</importWPID>

</item>

-----------------------------------------------------------------------------

I have added the "importWPID" tag in the "ID" post field tag.

I run the import one time : post is created.

I run the import the second time : new post is created. It's not detected as duplicate post / or update the first post.

ID field isn't used like title to detect duplicate posts and just update fields of the first created one ?

In your video, you say title for duplicates, but we can use ID for detecting duplicates :  https://youtu.be/6jBohrOYFSM?t=690

Thank you for your help