diff --git a/CHANGES_NEXT_RELEASE b/CHANGES_NEXT_RELEASE
index e69de29bb..be5fff215 100644
--- a/CHANGES_NEXT_RELEASE
+++ b/CHANGES_NEXT_RELEASE
@@ -0,0 +1 @@
+- [cygnus-ngsi][ColumnAggregator][LastData] Fix error when remove old values in lastData which does not exist (i.e. creating and updating entities)
diff --git a/cygnus-ngsi/src/main/java/com/telefonica/iot/cygnus/aggregation/NGSIGenericColumnAggregator.java b/cygnus-ngsi/src/main/java/com/telefonica/iot/cygnus/aggregation/NGSIGenericColumnAggregator.java
index 5e75c49ea..e031211b9 100644
--- a/cygnus-ngsi/src/main/java/com/telefonica/iot/cygnus/aggregation/NGSIGenericColumnAggregator.java
+++ b/cygnus-ngsi/src/main/java/com/telefonica/iot/cygnus/aggregation/NGSIGenericColumnAggregator.java
@@ -244,7 +244,10 @@ public void aggregate(NGSIEvent event) {
                             if (storedTS < currentTS) {
                                 ArrayList<String> keys = new ArrayList<>(aggregation.keySet());
                                 for (int j = 0 ; j < keys.size() ; j++) {
-                                    lastData.get(keys.get(j)).remove(i);
+                                    ArrayList<JsonElement> lst = lastData.get(keys.get(j));
+                                    if (lst != null) {
+                                        lst.remove(i);
+                                    }
                                 }
                                 updateLastData = true;
                                 break;