Minor fixes

application/src/main/java/org/thingsboard/server/service/subscription/DefaultTbEntityDataSubscriptionService.java

@@ -178,8 +178,6 @@ public class DefaultTbEntityDataSubscriptionService implements TbEntityDataSubsc
                 log.debug("[{}][{}] Updating data using query: {}", session.getSessionId(), cmd.getCmdId(), cmd.getQuery());
             }
             ctx.setAndResolveQuery(cmd.getQuery());
-            TenantId tenantId = ctx.getTenantId();
-            CustomerId customerId = ctx.getCustomerId();
             EntityDataQuery query = ctx.getQuery();
             //Step 1. Update existing query with the contents of LatestValueCmd
             if (cmd.getLatestCmd() != null) {

application/src/main/java/org/thingsboard/server/service/subscription/TbAbstractDataSubCtx.java

@@ -74,7 +74,7 @@ public abstract class TbAbstractDataSubCtx<T extends AbstractDataQuery<? extends
 
     @Override
     public boolean isDynamic() {
-        return query.getPageLink().isDynamic();
+        return query != null && query.getPageLink().isDynamic();
     }
 
     @Override