diff --git a/dhp-workflows/dhp-dedup-openaire/src/main/java/eu/dnetlib/dhp/oa/dedup/SparkPrepareOrgRels.java b/dhp-workflows/dhp-dedup-openaire/src/main/java/eu/dnetlib/dhp/oa/dedup/SparkPrepareOrgRels.java
index 61325ab50..4fea61c18 100644
--- a/dhp-workflows/dhp-dedup-openaire/src/main/java/eu/dnetlib/dhp/oa/dedup/SparkPrepareOrgRels.java
+++ b/dhp-workflows/dhp-dedup-openaire/src/main/java/eu/dnetlib/dhp/oa/dedup/SparkPrepareOrgRels.java
@@ -217,7 +217,7 @@ public class SparkPrepareOrgRels extends AbstractSparkAction {
 					final Organization o = r._2()._2();
 					return new OrgSimRel(
 						r._1()._1(),
-						o.getOriginalId().get(0),
+						Optional.ofNullable(o.getOriginalId()).map(oid -> oid.get(0)).orElse(null),
 						Optional.ofNullable(o.getLegalname()).map(Field::getValue).orElse(""),
 						Optional.ofNullable(o.getLegalshortname()).map(Field::getValue).orElse(""),
 						Optional.ofNullable(o.getCountry()).map(Qualifier::getClassid).orElse(""),