According to the Google Search Console report, I have some warnings. like,
Problem 1. Invalid object type for field "brand".
I can't understand what is happening with the brand."brand":{"@type":"Thing","name":"Dell"}}
Problem 2. Missing field "sku" "gtin" "mpn" "isbn" "aggregateRating".
Can I use SKU/MPN/aggregateRating with automatically generating value as like product id?