Caused by: com.vaadin.data.util.converter.Converter$ConversionException: Cannot convert class java.util.LinkedHashSet to class java.util.LinkedList
	at info.magnolia.ui.vaadin.integration.jcr.DefaultProperty.setValue(DefaultProperty.java:66)
	at info.magnolia.personalization.ui.TraitValueCompositeTransformer.writeToItem(TraitValueCompositeTransformer.java:64)
	at info.magnolia.ui.form.field.transformer.composite.CompositeTransformer.writeToItem(CompositeTransformer.java:1)
	at info.magnolia.ui.form.field.transformer.TransformedProperty.setValue(TransformedProperty.java:67)
	at info.magnolia.ui.form.field.AbstractCustomMultiField$1.valueChange(AbstractCustomMultiField.java:185)