diff --git a/src/main/java/org/gcube/data_catalogue/grsf_publish_ws/utils/threads/AssociationToGroupThread.java b/src/main/java/org/gcube/data_catalogue/grsf_publish_ws/utils/threads/AssociationToGroupThread.java
index 7b1d440..6bf54d4 100644
--- a/src/main/java/org/gcube/data_catalogue/grsf_publish_ws/utils/threads/AssociationToGroupThread.java
+++ b/src/main/java/org/gcube/data_catalogue/grsf_publish_ws/utils/threads/AssociationToGroupThread.java
@@ -110,7 +110,7 @@ public class AssociationToGroupThread extends Thread {
 			List<CkanGroup> parents = catalogue.getParentGroups(group, apiKey);
 
 			if(parents == null || parents.isEmpty())
-				return;
+				continue;
 
 			for (CkanGroup ckanGroup : parents) {
 				List<String> parentsList = new ArrayList<String>(Arrays.asList(ckanGroup.getName()));