added useLatestTs check when CF updated

application/src/main/java/org/thingsboard/server/service/cf/ctx/state/CalculatedFieldCtx.java

@@ -574,6 +574,11 @@ public class CalculatedFieldCtx implements Closeable {
         if (!Objects.equals(output, other.output)) {
             return true;
         }
+        if (calculatedField.getConfiguration() instanceof SimpleCalculatedFieldConfiguration thisConfig
+                && other.calculatedField.getConfiguration() instanceof SimpleCalculatedFieldConfiguration otherConfig
+                && thisConfig.isUseLatestTs() != otherConfig.isUseLatestTs()) {
+            return true;
+        }
         if (cfType == CalculatedFieldType.ALARM) {
             if (!calculatedField.getName().equals(other.getCalculatedField().getName())) {
                 return true;

application/src/main/java/org/thingsboard/server/service/cf/ctx/state/aggregation/function/CountUniqueAggEntry.java

@@ -15,7 +15,6 @@
  */
 package org.thingsboard.server.service.cf.ctx.state.aggregation.function;
 
-import org.thingsboard.common.util.JacksonUtil;
 import org.thingsboard.server.common.data.cf.configuration.aggregation.AggFunction;
 
 import java.util.Optional;
@@ -28,7 +27,7 @@ public class CountUniqueAggEntry implements AggEntry {
     @Override
     public void update(Object value) {
         if (value != null) {
-            items.add(JacksonUtil.toString(value));
+            items.add(String.valueOf(value));
         }
     }