diff --git a/dnet-ariadneplus-graphdb-publisher/src/main/resources/eu/dnetlib/ariadneplus/sparql/check_missing_mandatory_coll_fields.sparql b/dnet-ariadneplus-graphdb-publisher/src/main/resources/eu/dnetlib/ariadneplus/sparql/check_missing_mandatory_coll_fields.sparql
index a906c4d..d226cb2 100644
--- a/dnet-ariadneplus-graphdb-publisher/src/main/resources/eu/dnetlib/ariadneplus/sparql/check_missing_mandatory_coll_fields.sparql
+++ b/dnet-ariadneplus-graphdb-publisher/src/main/resources/eu/dnetlib/ariadneplus/sparql/check_missing_mandatory_coll_fields.sparql
@@ -95,7 +95,15 @@ SELECT * WHERE {
             ?s rdf:type <https://www.ariadne-infrastructure.eu/resource/ao/cat/1.1/AO_Collection> .
             ?s	aocat:has_type ?type .
         }
+    }
+    UNION{
+        ?s rdf:type <https://www.ariadne-infrastructure.eu/resource/ao/cat/1.1/AO_Collection> .
+        MINUS {
+            ?s rdf:type <https://www.ariadne-infrastructure.eu/resource/ao/cat/1.1/AO_Collection> .
+            ?s	aocat:has_temporal_coverage ?temporalCoverage .
         }
+    }
+
 }
     FILTER(?g != <https://ariadne-infrastructure.eu/api_________::ariadne_plus::ads::collSubjects>)
 }
\ No newline at end of file