Feed Infentifiers Error

I followed this tutorial below to send product feed to google merchant center,all was ok but then, I erased my product list and feed on merchant center and I also erased my feed on my website to try again. I see the new products inside the list within google merchant but right now, I have to problems and I don’t know what to do at all

1.-I only see product variations, not the main product as I saw before
2.- All my products got problems with Missing identifiers [gtin, mpn, brand] and I never had that before in the first place.

My product feed has mpn set as sku number but it’s not working, I also added the gtin as seen in the picture and I cant solve the problem

https://i.imgur.com/hCQ3ihf.png
https://i.imgur.com/LJf57oT.png
https://i.imgur.com/bWcOfW7.png
https://i.imgur.com/b7pMh2g.png
https://i.imgur.com/Q77r7gx.png

Please help, I don’t know what to do, I get my products from alidropship

Here is the system status

https://imgur.com/RLRgGVK

Here is the log
https://i.imgur.com/EeWaECE.png