diff --git a/dhp-workflows/dhp-doiboost/src/main/java/eu/dnetlib/doiboost/orcid/SparkConvertORCIDToOAF.scala b/dhp-workflows/dhp-doiboost/src/main/java/eu/dnetlib/doiboost/orcid/SparkConvertORCIDToOAF.scala
index 64be5e79a..af1d4ac37 100644
--- a/dhp-workflows/dhp-doiboost/src/main/java/eu/dnetlib/doiboost/orcid/SparkConvertORCIDToOAF.scala
+++ b/dhp-workflows/dhp-doiboost/src/main/java/eu/dnetlib/doiboost/orcid/SparkConvertORCIDToOAF.scala
@@ -15,6 +15,12 @@ import org.slf4j.{Logger, LoggerFactory}
 object SparkConvertORCIDToOAF {
   val logger: Logger = LoggerFactory.getLogger(SparkConvertORCIDToOAF.getClass)
 
+    def fixORCIDItem(item :ORCIDItem):ORCIDItem = {
+    item.authors = item.authors.groupBy(_.oid).map(_._2.head)
+    item
+  }
+
+
   def run(spark:SparkSession,sourcePath:String,workingPath:String, targetPath:String):Unit = {
     import spark.implicits._
     implicit val mapEncoderPubs: Encoder[Publication] = Encoders.kryo[Publication]
@@ -37,7 +43,8 @@ object SparkConvertORCIDToOAF {
       val author = i._2
       (doi, author)
     }).groupBy(col("_1").alias("doi"))
-      .agg(collect_list(col("_2")).alias("authors"))
+      .agg(collect_list(col("_2")).alias("authors")).as[ORCIDItem]
+      .map(s => fixORCIDItem(s))
       .write.mode(SaveMode.Overwrite).save(s"$workingPath/orcidworksWithAuthor")
 
     val dataset: Dataset[ORCIDItem] =spark.read.load(s"$workingPath/orcidworksWithAuthor").as[ORCIDItem]