diff --git a/dnet-ariadneplus-graphdb-publisher/src/main/resources/eu/dnetlib/ariadneplus/sparql/enrich/IAA/ordered_sparql_insert_IAA_sites.sparql b/dnet-ariadneplus-graphdb-publisher/src/main/resources/eu/dnetlib/ariadneplus/sparql/enrich/IAA/ordered_sparql_insert_IAA_sites.sparql
index ec59b56..c20c0fc 100644
--- a/dnet-ariadneplus-graphdb-publisher/src/main/resources/eu/dnetlib/ariadneplus/sparql/enrich/IAA/ordered_sparql_insert_IAA_sites.sparql
+++ b/dnet-ariadneplus-graphdb-publisher/src/main/resources/eu/dnetlib/ariadneplus/sparql/enrich/IAA/ordered_sparql_insert_IAA_sites.sparql
@@ -1,6 +1,9 @@
 ADD SILENT <https://ariadne-infrastructure.eu/api_________::ariadne_plus::iaa_survey::maps> TO <https://ariadne-infrastructure.eu/api_________::ariadne_plus::iaa_survey::sites>;
 DROP SILENT GRAPH <https://ariadne-infrastructure.eu/api_________::ariadne_plus::iaa_survey::maps>;
 
+ADD SILENT <https://ariadne-infrastructure.eu/api_________::ariadne_plus::iaa_survey::periods> TO <https://ariadne-infrastructure.eu/api_________::ariadne_plus::iaa_survey::sites>;
+DROP SILENT GRAPH <https://ariadne-infrastructure.eu/api_________::ariadne_plus::iaa_survey::periods>;
+
 
 PREFIX aocat: <https://www.ariadne-infrastructure.eu/resource/ao/cat/1.1/>
 PREFIX skos: <http://www.w3.org/2004/02/skos/core#>