// migration was complete in 2020-May release. So this
	// a check to avoid migrating for buckets that already
	// have this field set.
	if b.Created.IsZero() {
		configs, err := b.getAllLegacyConfigs(ctx, objectAPI)
		if err != nil {
			return b, err
		}

		if len(configs) > 0 {
			// Old bucket without bucket metadata. Hence we migrate existing settings.