Error after updating to Graylog Open 5.2.10 (Unhandled exception)

## Expected Behavior
No Errors after update from the previous version.

## Current Behavior
Error after starting graylog service, and it keeps comming aftetr a restart.

```
ERROR [AnyExceptionClassMapper] Unhandled exception in REST resource
java.lang.NullPointerException: Cannot read field "appendEventsPerSec" because "throttleState" is null
at org.graylog2.rest.resources.system.JournalResource.show(JournalResource.java:81) ~[graylog.jar:?]
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?]
at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:?]
at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:?]
at java.lang.reflect.Method.invoke(Unknown Source) ~[?:?]
at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory.lambda$static$0(ResourceMethodInvocationHandlerFactory.java:52) ~[graylog.jar:?]
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:134) ~[graylog.jar:?]
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:177) ~[graylog.jar:?]
at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$TypeOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:219) ~[graylog.jar:?]
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:81) ~[graylog.jar:?]
at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:478) ~[graylog.jar:?]
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:400) ~[graylog.jar:?]
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:81) ~[graylog.jar:?]
at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:255) [graylog.jar:?]
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:248) [graylog.jar:?]
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:244) [graylog.jar:?]
at org.glassfish.jersey.internal.Errors.process(Errors.java:292) [graylog.jar:?]
at org.glassfish.jersey.internal.Errors.process(Errors.java:274) [graylog.jar:?]
at org.glassfish.jersey.internal.Errors.process(Errors.java:244) [graylog.jar:?]
at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:265) [graylog.jar:?]
at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:234) [graylog.jar:?]
at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:684) [graylog.jar:?]
at org.glassfish.jersey.grizzly2.httpserver.GrizzlyHttpContainer.service(GrizzlyHttpContainer.java:356) [graylog.jar:?]
at org.glassfish.grizzly.http.server.HttpHandler$1.run(HttpHandler.java:200) [graylog.jar:?]
at com.codahale.metrics.InstrumentedExecutorService$InstrumentedRunnable.run(InstrumentedExecutorService.java:180) [graylog.jar:?]
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [?:?]
at java.lang.Thread.run(Unknown Source) [?:?]

```

## Possible Solution

## Steps to Reproduce (for bugs)
Restart the graylog service

## Context
Nu operational problem to see in the webinterface, no notice

## Your Environment
Rocky Linux 8.10, fully updated
Elasticsearch 7.10.2 on the same server

* Graylog Version: 5.2.10
* Java Version: OpenJDK Runtime Environment (build 1.8.0_422-b05) (graylog has it's own)
* OpenSearch Version: nb.
* MongoDB Version: mongodb-org-5.0.28-1.el8.x86_64
* Operating System: Rocky Linux 8.10
* Browser version: Chome