What’s changing? Why is this changing? What do I need to do? Can I opt-out of the auto-migration? How will the migrations occur? How do I know when an account has been migrated? 
bool image_asset_auto_migration_done
string image_asset_auto_migration_done_date_time
bool location_asset_auto_migration_done
string location_asset_auto_migration_done_date_time
 
If you are using v12, you can instead consult the UI and you will see an alert once your account has been migrated.What happens after the auto-migration? forum .Bob Hancock, Google Ads API Team