User update throws with "AdditionalData can not be null" after migration from 5.47.0 to 5.51.0

[faschwardalog]

Describe the bug

I am trying to update the settings of a user. It was working fine up to now, but after the migration to 5.51.0 it crashes out with "AdditionalData can not be null".

Expected behavior

Users can be updated without the sdk crashing. Might relate to the user update endpoint not returning any body but just a 204.

How to reproduce

Just try to update any user with version 5.51.0

const string userId = "user-id";
var user = await _client.Users[userId].GetAsync(cancellationToken: cancellationToken);
user.City += "a";
await _client.Users[userId].PatchAsync(user, cancellationToken: cancellationToken);

SDK Version

5.51.0

Latest version known to work for scenario above?

5.47.0

Known Workarounds

No response

Debug output

Click to expand log

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</details>


### Configuration

_No response_

### Other information

_No response_

[DavidLievrouw]

Same here. Still works with v5.49.0. Here's my stacktrace:

System.AggregateException
One or more errors occurred. (AdditionalData can not be null) (Specified HTTP method is not allowed for the request target.)
  Exception doesn't have a stacktrace

System.InvalidOperationException
AdditionalData can not be null
   at Microsoft.Graph.Models.Entity.get_AdditionalData()
   at Microsoft.Graph.Models.Entity.Serialize(ISerializationWriter writer)
   at Microsoft.Graph.Models.DirectoryObject.Serialize(ISerializationWriter writer)
   at Microsoft.Graph.Models.Group.Serialize(ISerializationWriter writer)
   at Microsoft.Kiota.Serialization.Json.JsonSerializationWriter.WriteObjectValue[T](String key, T value, IParsable[] additionalValuesToMerge)
   at Microsoft.Kiota.Abstractions.RequestInformation.SetContentFromParsable[T](IRequestAdapter requestAdapter, String contentType, T item)
   at Microsoft.Graph.Groups.Item.GroupItemRequestBuilder.ToPatchRequestInformation(Group body, Action`1 requestConfiguration)
   at Microsoft.Graph.Groups.Item.GroupItemRequestBuilder.PatchAsync(Group body, Action`1 requestConfiguration, CancellationToken cancellationToken)

[TDroogers]

It can be fixed/hidden by adding a value to AdditionalData.

fromGet.AdditionalData = new Dictionary<string, object>();

[faschwardalog]

It can be fixed/hidden by adding a value to AdditionalData.

fromGet.AdditionalData = new Dictionary<string, object>();

Unfortunately did not help me :-(