diff --git a/dnet-ariadneplus-graphdb-publisher/src/main/resources/eu/dnetlib/ariadneplus/sparql/check_missing_mandatory_record_fields.sparql b/dnet-ariadneplus-graphdb-publisher/src/main/resources/eu/dnetlib/ariadneplus/sparql/check_missing_mandatory_record_fields.sparql
index 7f9281d..85402ac 100644
--- a/dnet-ariadneplus-graphdb-publisher/src/main/resources/eu/dnetlib/ariadneplus/sparql/check_missing_mandatory_record_fields.sparql
+++ b/dnet-ariadneplus-graphdb-publisher/src/main/resources/eu/dnetlib/ariadneplus/sparql/check_missing_mandatory_record_fields.sparql
@@ -3,7 +3,7 @@ PREFIX  aocat: <https://www.ariadne-infrastructure.eu/resource/ao/cat/1.1/>
 PREFIX  rdf:  <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
 PREFIX  rdfs: <http://www.w3.org/2000/01/rdf-schema#>
 
-SELECT DISTINCT ?s WHERE {
+SELECT ?s WHERE {
     GRAPH ?g {
     {
         ?s rdf:type <https://www.ariadne-infrastructure.eu/resource/ao/cat/1.1/AO_Individual_Data_Resource> .