fix: avoid duplicate workflow if ControlloPratica is missing

liferay-plugins-sdk-6.2/portlets/portos-bo-portlet/docroot/WEB-INF/src/it/mwg/sismica/bo/util/SismicaUtil.java

@@ -960,7 +960,7 @@ public class SismicaUtil {
 						if (tokens.contains(controllo.getControlloPraticaId()))
 							tokenCount++;
 					}
-					if (0 == tokenCount) {
+					if (0 == tokenCount && Validator.isNotNull(last)) {
 						ServiceContext serviceContext = new ServiceContext();
 						serviceContext.setCompanyId(last.getCompanyId());
 						serviceContext.setScopeGroupId(last.getGroupId());