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 9e2212f4c..8e38a5515 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
@@ -133,7 +133,7 @@ public class ResultMapper implements Serializable {
 					.ifPresent(value -> value.stream().forEach(f -> formatList.add(f.getValue())));
 				out.setFormat(formatList);
 				out.setId(input.getId());
-				out.setOriginalId(input.getOriginalId());
+				out.setOriginalId(input.getOriginalId().stream().filter(s -> !s.startsWith("50|")).collect(Collectors.toList()));
 
 				Optional<List<eu.dnetlib.dhp.schema.oaf.Instance>> oInst = Optional
 					.ofNullable(input.getInstance());