diff --git a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/merge/MergeGraphSparkJob.java b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/merge/MergeGraphSparkJob.java
index 67068e072..b723de955 100644
--- a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/merge/MergeGraphSparkJob.java
+++ b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/merge/MergeGraphSparkJob.java
@@ -37,6 +37,8 @@ public class MergeGraphSparkJob {
 
 	private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();
 
+	private static final String PRIORITY_DEFAULT = "BETA"; // BETA | PROD
+
 	public static void main(String[] args) throws Exception {
 
 		String jsonConfiguration = IOUtils
@@ -47,6 +49,11 @@ public class MergeGraphSparkJob {
 		final ArgumentApplicationParser parser = new ArgumentApplicationParser(jsonConfiguration);
 		parser.parseArgument(args);
 
+		String priority = Optional
+			.ofNullable(parser.get("priority"))
+			.orElse(PRIORITY_DEFAULT);
+		log.info("priority: {}", priority);
+
 		Boolean isSparkSessionManaged = Optional
 			.ofNullable(parser.get("isSparkSessionManaged"))
 			.map(Boolean::valueOf)
@@ -76,12 +83,13 @@ public class MergeGraphSparkJob {
 			isSparkSessionManaged,
 			spark -> {
 				removeOutputDir(spark, outputPath);
-				mergeGraphTable(spark, betaInputPath, prodInputPath, entityClazz, entityClazz, outputPath);
+				mergeGraphTable(spark, priority, betaInputPath, prodInputPath, entityClazz, entityClazz, outputPath);
 			});
 	}
 
 	private static <P extends Oaf, B extends Oaf> void mergeGraphTable(
 		SparkSession spark,
+		String priority,
 		String betaInputPath,
 		String prodInputPath,
 		Class<P> p_clazz,
@@ -96,13 +104,13 @@ public class MergeGraphSparkJob {
 			.map((MapFunction<Tuple2<Tuple2<String, P>, Tuple2<String, B>>, P>) value -> {
 				Optional<P> p = Optional.ofNullable(value._1()).map(Tuple2::_2);
 				Optional<B> b = Optional.ofNullable(value._2()).map(Tuple2::_2);
-				if (b.isPresent() & !p.isPresent()) {
-					return (P)b.get();
+				switch (priority) {
+					default:
+					case "BETA":
+						return mergeWithPriorityToBETA(p, b);
+					case "PROD":
+						return mergeWithPriorityToPROD(p, b);
 				}
-				if (p.isPresent()) {
-					return p.get();
-				}
-				return null;
 			}, Encoders.bean(p_clazz))
 			.filter((FilterFunction<P>) Objects::nonNull)
 			.write()
@@ -111,6 +119,26 @@ public class MergeGraphSparkJob {
 			.json(outputPath);
 	}
 
+	private static <P extends Oaf, B extends Oaf> P mergeWithPriorityToPROD(Optional<P> p, Optional<B> b) {
+		if (b.isPresent() & !p.isPresent()) {
+			return (P) b.get();
+		}
+		if (p.isPresent()) {
+			return p.get();
+		}
+		return null;
+	}
+
+	private static <P extends Oaf, B extends Oaf> P mergeWithPriorityToBETA(Optional<P> p, Optional<B> b) {
+		if (p.isPresent() & !b.isPresent()) {
+			return p.get();
+		}
+		if (b.isPresent()) {
+			return (P) b.get();
+		}
+		return null;
+	}
+
 	private static <T extends Oaf> Dataset<Tuple2<String, T>> readTableFromPath(
 		SparkSession spark, String inputEntityPath, Class<T> clazz) {
 
diff --git a/dhp-workflows/dhp-graph-mapper/src/main/resources/eu/dnetlib/dhp/oa/graph/merge/oozie_app/workflow.xml b/dhp-workflows/dhp-graph-mapper/src/main/resources/eu/dnetlib/dhp/oa/graph/merge/oozie_app/workflow.xml
index 0a512fb6a..07a125fb6 100644
--- a/dhp-workflows/dhp-graph-mapper/src/main/resources/eu/dnetlib/dhp/oa/graph/merge/oozie_app/workflow.xml
+++ b/dhp-workflows/dhp-graph-mapper/src/main/resources/eu/dnetlib/dhp/oa/graph/merge/oozie_app/workflow.xml
@@ -13,6 +13,10 @@
             <name>graphOutputPath</name>
             <description>the output merged graph root path</description>
         </property>
+        <property>
+            <name>priority</name>
+            <description>decides from which infrastructure the content must win in case of ID clash</description>
+        </property>
 
         <property>
             <name>sparkDriverMemory</name>
@@ -88,6 +92,7 @@
             <arg>--prodInputPath</arg><arg>${prodInputGgraphPath}/publication</arg>
             <arg>--outputPath</arg><arg>${graphOutputPath}/publication</arg>
             <arg>--graphTableClassName</arg><arg>eu.dnetlib.dhp.schema.oaf.Publication</arg>
+            <arg>--priority</arg><arg>${priority}</arg>
         </spark>
         <ok to="wait_merge"/>
         <error to="Kill"/>
@@ -114,6 +119,7 @@
             <arg>--prodInputPath</arg><arg>${prodInputGgraphPath}/dataset</arg>
             <arg>--outputPath</arg><arg>${graphOutputPath}/dataset</arg>
             <arg>--graphTableClassName</arg><arg>eu.dnetlib.dhp.schema.oaf.Dataset</arg>
+            <arg>--priority</arg><arg>${priority}</arg>
         </spark>
         <ok to="wait_merge"/>
         <error to="Kill"/>
@@ -140,6 +146,7 @@
             <arg>--prodInputPath</arg><arg>${prodInputGgraphPath}/otherresearchproduct</arg>
             <arg>--outputPath</arg><arg>${graphOutputPath}/otherresearchproduct</arg>
             <arg>--graphTableClassName</arg><arg>eu.dnetlib.dhp.schema.oaf.OtherResearchProduct</arg>
+            <arg>--priority</arg><arg>${priority}</arg>
         </spark>
         <ok to="wait_merge"/>
         <error to="Kill"/>
@@ -166,6 +173,7 @@
             <arg>--prodInputPath</arg><arg>${prodInputGgraphPath}/software</arg>
             <arg>--outputPath</arg><arg>${graphOutputPath}/software</arg>
             <arg>--graphTableClassName</arg><arg>eu.dnetlib.dhp.schema.oaf.Software</arg>
+            <arg>--priority</arg><arg>${priority}</arg>
         </spark>
         <ok to="wait_merge"/>
         <error to="Kill"/>
@@ -192,6 +200,7 @@
             <arg>--prodInputPath</arg><arg>${prodInputGgraphPath}/datasource</arg>
             <arg>--outputPath</arg><arg>${graphOutputPath}/datasource</arg>
             <arg>--graphTableClassName</arg><arg>eu.dnetlib.dhp.schema.oaf.Datasource</arg>
+            <arg>--priority</arg><arg>${priority}</arg>
         </spark>
         <ok to="wait_merge"/>
         <error to="Kill"/>
@@ -218,6 +227,7 @@
             <arg>--prodInputPath</arg><arg>${prodInputGgraphPath}/organization</arg>
             <arg>--outputPath</arg><arg>${graphOutputPath}/organization</arg>
             <arg>--graphTableClassName</arg><arg>eu.dnetlib.dhp.schema.oaf.Organization</arg>
+            <arg>--priority</arg><arg>${priority}</arg>
         </spark>
         <ok to="wait_merge"/>
         <error to="Kill"/>
@@ -244,6 +254,7 @@
             <arg>--prodInputPath</arg><arg>${prodInputGgraphPath}/project</arg>
             <arg>--outputPath</arg><arg>${graphOutputPath}/project</arg>
             <arg>--graphTableClassName</arg><arg>eu.dnetlib.dhp.schema.oaf.Project</arg>
+            <arg>--priority</arg><arg>${priority}</arg>
         </spark>
         <ok to="wait_merge"/>
         <error to="Kill"/>
@@ -266,11 +277,11 @@
                 --conf spark.eventLog.dir=${nameNode}${spark2EventLogDir}
                 --conf spark.sql.shuffle.partitions=7680
             </spark-opts>
-
             <arg>--betaInputPath</arg><arg>${betaInputGgraphPath}/relation</arg>
             <arg>--prodInputPath</arg><arg>${prodInputGgraphPath}/relation</arg>
             <arg>--outputPath</arg><arg>${graphOutputPath}/relation</arg>
             <arg>--graphTableClassName</arg><arg>eu.dnetlib.dhp.schema.oaf.Relation</arg>
+            <arg>--priority</arg><arg>${priority}</arg>
         </spark>
         <ok to="wait_merge"/>
         <error to="Kill"/>
diff --git a/dhp-workflows/dhp-graph-mapper/src/main/resources/eu/dnetlib/dhp/oa/graph/merge_graphs_parameters.json b/dhp-workflows/dhp-graph-mapper/src/main/resources/eu/dnetlib/dhp/oa/graph/merge_graphs_parameters.json
index 6018b7e93..1a612807b 100644
--- a/dhp-workflows/dhp-graph-mapper/src/main/resources/eu/dnetlib/dhp/oa/graph/merge_graphs_parameters.json
+++ b/dhp-workflows/dhp-graph-mapper/src/main/resources/eu/dnetlib/dhp/oa/graph/merge_graphs_parameters.json
@@ -28,5 +28,11 @@
 		"paramLongName": "graphTableClassName",
 		"paramDescription": "class name moelling the graph table",
 		"paramRequired": true
+	},
+	{
+		"paramName": "pr",
+		"paramLongName": "priority",
+		"paramDescription": "decides from which infrastructure the content must win in case of ID clash",
+		"paramRequired": false
 	}
 ]
\ No newline at end of file