Fixes: attribute sku is not included in serialization resulting to variant(s) deletion (for some specific scenarios)
Fixes: attribute sku is not included in serialization resulting to variant(s) deletion (for some specific scenarios)

Merchello/Merchello.Bazaar,ProNotion/Merchello,clausjensen/Merchello,Merchello/Merchello,Merchello/Merchello,ProNotion/Merchello,clausjensen/Merchello,Merchello/Merchello.Bazaar,Merchello/Merchello,ProNotion/Merchello,rasmusjp/Merchello,rasmusjp/Merchello,rasmusjp/Merchello,Merchello/Merchello.Bazaar,clausjensen/Merchello