Is there a way to exclude relationship fields from being updated like OwnerId field? For example,
data in Pricebook2, Product2 and PricebookEntry are included in newly created developer sandboxes so there is no need to migrated them afterwards. But if they are not included in the instruction files when migrating data for objects like OpportunityLineItem or QuoteLineItem, the corresponding lookup Id values will be empty which prevent the record from being inserted since they are required. Thanks.