diff --git a/ckanext/odsh/collection/helpers.py b/ckanext/odsh/collection/helpers.py
index 82edf228b576b606640fb11fba5d98d00cf4b047..7ae78588dde8c7245870b1eaf29e57a54f86dafd 100644
--- a/ckanext/odsh/collection/helpers.py
+++ b/ckanext/odsh/collection/helpers.py
@@ -181,4 +181,6 @@ def get_latest_resources_for_format(collection_name, resource_format):
         return None
     resources_with_asked_type = [r for r in resources if r.get('format').upper() == resource_format.upper()]
     resources_sorted = sorted(resources_with_asked_type, key=itemgetter('id','created'), reverse=True)
+    if len(resources_sorted) < 2:
+        return None
     return resources_sorted[-1]