diff --git a/dhp-common/src/main/java/eu/dnetlib/dhp/monitor/model/AggregationMetric.java b/dhp-common/src/main/java/eu/dnetlib/dhp/monitor/model/AggregationMetric.java
index 01fda50c8..57b74c257 100644
--- a/dhp-common/src/main/java/eu/dnetlib/dhp/monitor/model/AggregationMetric.java
+++ b/dhp-common/src/main/java/eu/dnetlib/dhp/monitor/model/AggregationMetric.java
@@ -72,7 +72,7 @@ public class AggregationMetric extends Metric <Long> {
 
 
     /**
-     * The Aggregation builder is a builder class usefull to create Aggregation metrics.
+     * The Aggregation builder is a builder class utility to create Aggregation metrics.
      */
     public static class AggregationBuilder {
 
@@ -86,10 +86,6 @@ public class AggregationMetric extends Metric <Long> {
 
         private String api;
 
-        private String date;
-
-        private Long total;
-
 
         /**
          * Creates aggregation builder already set the metric type of aggregation collection.