diff --git a/dnet-ariadneplus-graphdb-publisher/src/main/resources/eu/dnetlib/ariadneplus/sparql/enrich/OEAW/ordered_sparql_insert_collection_oeaw_arche.sparql b/dnet-ariadneplus-graphdb-publisher/src/main/resources/eu/dnetlib/ariadneplus/sparql/enrich/OEAW/ordered_sparql_insert_collection_oeaw_arche.sparql
index 7404a4a..636b373 100644
--- a/dnet-ariadneplus-graphdb-publisher/src/main/resources/eu/dnetlib/ariadneplus/sparql/enrich/OEAW/ordered_sparql_insert_collection_oeaw_arche.sparql
+++ b/dnet-ariadneplus-graphdb-publisher/src/main/resources/eu/dnetlib/ariadneplus/sparql/enrich/OEAW/ordered_sparql_insert_collection_oeaw_arche.sparql
@@ -21,14 +21,14 @@ INSERT {
 PREFIX aocat: <https://www.ariadne-infrastructure.eu/resource/ao/cat/1.1/>
 DELETE WHERE {
 GRAPH <https://ariadne-infrastructure.eu/api_________::ariadne_plus::arche::oai> {
-    ?x aocat:from "" .
+    ?x aocat:from ""^^xsd:dateTime .
 }
 };
 
 PREFIX aocat: <https://www.ariadne-infrastructure.eu/resource/ao/cat/1.1/>
 DELETE WHERE {
 GRAPH <https://ariadne-infrastructure.eu/api_________::ariadne_plus::arche::oai> {
-    ?x aocat:until "" .
+    ?x aocat:until ""^^xsd:dateTime .
 }
 };
 
@@ -52,6 +52,26 @@ WHERE {
     }
 };
 
+PREFIX aocat: <https://www.ariadne-infrastructure.eu/resource/ao/cat/1.1/>
+PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
+INSERT {
+    GRAPH <https://ariadne-infrastructure.eu/api_________::ariadne_plus::arche::oai> {
+      ?s	aocat:has_creator <https://ariadne-infrastructure.eu/aocat/Agent/NOTPROVIDED> .
+      <https://ariadne-infrastructure.eu/aocat/Agent/NOTPROVIDED> rdf:type <https://www.ariadne-infrastructure.eu/resource/ao/cat/1.1/AO_Agent> .
+      <https://ariadne-infrastructure.eu/aocat/Agent/NOTPROVIDED> rdfs:label "Not provided" .
+      <https://ariadne-infrastructure.eu/aocat/Agent/NOTPROVIDED> aocat:has_name "Not provided" .
+    }
+}
+WHERE {
+    GRAPH <https://ariadne-infrastructure.eu/api_________::ariadne_plus::arche::oai> {
+        ?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_creator ?agent .
+        }
+    }
+};
+
 PREFIX aocat: <https://www.ariadne-infrastructure.eu/resource/ao/cat/1.1/>
 PREFIX skos: <http://www.w3.org/2004/02/skos/core#>
 PREFIX ariadneplus: <https://ariadne-infrastructure.eu/aocat/>