Can anyone make sense of these instructions?
I had a new shipment arrive for a new product, not only did they find 600 out of 500 sent (lol) but they have also gone straight into stranded inv. heres the instructions…I cant figure it out.

Upon investigation it is found that there is Invalid combination of FulfillmentCenterID.

Therefore we request you to submit a fulfillment channel switch feed to remove the incorrect channel and submit partial update feed and mention the correct channel “AMAZON_EU” as in the feed to remove the other exchange.

To upload and save a partial update, follow the steps mentioned below:

1. Enter the SKU of the item of concern

2. The fields you want to change: fulfillment channels

3. In “Update/Delete”, enter the value “PartialUpdate”. You can download the inventory file from the following link:
   https://sellercentral-europe.amazon.com/listing/download

4. You must save the file before you upload it

5. Click “Inventory” and then “Upload Multiple Items.” Click the Upload Inventory File tab

6. In the “Upload a file” section, click the “File Type” drop-down menu. Select the “Order Category Inventory Files” file type

7. Click Browse and select the file

8. Click Upload to upload the file. You are required to upload in the link below:
   https://sellercentral-europe.amazon.com/listing/upload?ref_=xx_upload_tnav_download