diff --git a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/dump/Constants.java b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/dump/Constants.java
index 86a275ae2..0d6db1783 100644
--- a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/dump/Constants.java
+++ b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/dump/Constants.java
@@ -24,8 +24,6 @@ public class Constants {
 
 	public static String RESEARCH_INFRASTRUCTURE = "Research Infrastructure/Initiative";
 
-	public static String ORCID = "orcid";
-
 	static {
 		accessRightsCoarMap.put("OPEN", "c_abf2");
 		accessRightsCoarMap.put("RESTRICTED", "c_16ec");
diff --git a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/dump/ResultMapper.java b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/dump/ResultMapper.java
index cb052ebaa..d30b3122c 100644
--- a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/dump/ResultMapper.java
+++ b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/dump/ResultMapper.java
@@ -503,7 +503,7 @@ public class ResultMapper implements Serializable {
 
 	private static Pid getOrcid(List<StructuredProperty> p) {
 		for (StructuredProperty pid : p) {
-			if (pid.getQualifier().getClassid().equals(Constants.ORCID)) {
+			if (pid.getQualifier().getClassid().equals(ModelConstants.ORCID)) {
 				Optional<DataInfo> di = Optional.ofNullable(pid.getDataInfo());
 				if (di.isPresent()) {
 					return Pid