diff --git a/CHANGES.md b/CHANGES.md
index 704fd19..f6e6283 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -4,10 +4,11 @@
 
 | **Version** | **Changes**                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | **Readiness** |
 |-------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------|
-| 6.1.1       | [Graph model] </br> <ul><li>Introduced constants used in the DOIBoost dismission.</li></ul>                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | beta          |
-| 6.1.0       | [Graph model] </br> <ul><li>Introduced model classes to provide a JSON representation of records embedding information from the related entities.</li></ul>                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | beta          |
-| 5.17.3      | [Graph model] </br> <ul><li>added result level textual field to store the transformative agreement information.</li></ul>                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | beta          |
-| 4.17.3      | [Graph model] </br> <ul><li>moved context at the level of the entity. </li></ul>                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 | beta          |
+| 6.1.3       | [Graph model] </br> <ul><li>Updated Solr JSON payload model classes</li></ul>                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | beta          |
+| 6.1.1       | [Graph model] </br> <ul><li>Introduced constants used in the DOIBoost dismission.</li></ul>                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | production    |
+| 6.1.0       | [Graph model] </br> <ul><li>Introduced model classes to provide a JSON representation of records embedding information from the related entities.</li></ul>                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      | production    |
+| 5.17.3      | [Graph model] </br> <ul><li>added result level textual field to store the transformative agreement information.</li></ul>                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        | production    |
+| 4.17.3      | [Graph model] </br> <ul><li>moved context at the level of the entity. </li></ul>                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 | production    |
 | 4.17.2      | [Graph model] </br> <ul><li>added InstaceTypeMapping field on the instance level.</li><li>new result level fields to support the activities in the Irish tender `isGreen`, `openAccessColor`, `isInDiamondJournal`, `publiclyFunded`</li><ul>                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    | production    |
 | 3.17.1      | [Graph model] </br> <ul><li>added fulltext field on the instance level.</li><li>added extra organization specific PID types</li><ul>                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             | production    |
 | 3.16.0      | [Graph model] </br> <ul><li>added entity level measures.</li><ul>                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                | production    |
diff --git a/src/test/java/eu/dnetlib/dhp/schema/solr/TestJsonSerialization.java b/src/test/java/eu/dnetlib/dhp/schema/solr/TestJsonSerialization.java
index ab10afa..d42ba63 100644
--- a/src/test/java/eu/dnetlib/dhp/schema/solr/TestJsonSerialization.java
+++ b/src/test/java/eu/dnetlib/dhp/schema/solr/TestJsonSerialization.java
@@ -1,11 +1,12 @@
 package eu.dnetlib.dhp.schema.solr;
 
-import com.fasterxml.jackson.databind.ObjectMapper;
-import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.*;
 
 import java.io.IOException;
 
-import static org.junit.jupiter.api.Assertions.*;
+import org.junit.jupiter.api.Test;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
 
 public class TestJsonSerialization {