diff --git a/dnet-ariadneplus-graphdb-publisher/src/main/resources/eu/dnetlib/ariadneplus/sparql/enrich/NIAM/ordered_sparql_insert_niam.sparql b/dnet-ariadneplus-graphdb-publisher/src/main/resources/eu/dnetlib/ariadneplus/sparql/enrich/NIAM/ordered_sparql_insert_niam.sparql
index 4fda5bc..18ef954 100644
--- a/dnet-ariadneplus-graphdb-publisher/src/main/resources/eu/dnetlib/ariadneplus/sparql/enrich/NIAM/ordered_sparql_insert_niam.sparql
+++ b/dnet-ariadneplus-graphdb-publisher/src/main/resources/eu/dnetlib/ariadneplus/sparql/enrich/NIAM/ordered_sparql_insert_niam.sparql
@@ -1,3 +1,16 @@
+PREFIX aocat:
+DELETE DATA {
+GRAPH {
+ aocat:was_issued "9921-10-31"^^xsd:dateTime .
+ }
+};
+
+PREFIX aocat:
+INSERT DATA {
+GRAPH {
+ aocat:was_issued "1992-10-31"^^xsd:dateTime .
+ }
+};
PREFIX aocat:
PREFIX rdf: