p:picklist gets cached although new values are set - jsf

Question

At this moment I've got a p:picklist which uses DualListModel<String>. The picklist has to be updated whenever a new entity is selected because the list of attributes changes depending on each entity.
But the values with which the picklist gets populated at first will be persisted even if onEntitySelect() gets called again, where I use setPicklistAttributes() to change the whole DualListModel.
I put sysouts inside of the setter and the right values get set by onEntitySelect(), but almost instantly the setter is being called again with the old values and my changes are overwritten.
Why does this happen? Is my way of resetting the DualListModel inside of onEntitySelect() wrong?
<p:picklist>:
<p:pickList id="pickList" value="#{dashboardBean.picklistAttributes}" var="attribute"
itemLabel="#{attribute)}"
itemValue="#{attribute}"/>
onEntitySelect():
public void onEntitySelect() {
currentAttributes = currentEntity.getAttributes();
List<Attribute> attributesSource =
currentAttributes.stream()
.sorted(this::compareLocalizedAttributeNames)
.collect(Collectors.toList());
setPicklistAttributes(new DualListModel<Attribute>(attributesSource, new ArrayList<Attribute>()));
}

Answer 1

Initialize DualListModel on init method which has #PostConstruct annotation. And instead of creating new DualListModel in each onEntitySelect set existing DuaListModels source and target with new ones. Here is a sample:
private DualListModel<Attribute> attributes;
#PostConstruct
public void init() {
// initialize service picklist
List<Attribute> source = new ArrayList<Attribute>();
List<Attribute> target = new ArrayList<Attribute>();
attributes= new DualListModel<Attribute>(source , target );
}
public void onEntitySelect() {
// create your newAttributesSoruce and Target here then set to existing DualistModel
attributes.setSource(newAttributesSource);
attributes.setTarget(newAttributesTarget);
}