EnumType throwing argument exception when adding values

[jimitndiaye]

I have the following, relatively simple EnumType:

public class OptionSetType : EnumType<int>
{
    private readonly EnumAttributeMetadata _metadata;
    private readonly string _connectionName;

    public OptionSetType(EnumAttributeMetadata metadata, string connectionName)
    {
        _metadata = metadata;
        _connectionName = connectionName;
    }

    protected override void Configure(IEnumTypeDescriptor<int> descriptor)
    {
        descriptor.Name($"MyApp_{_connectionName}_{_metadata.OptionSet.Name}_Options");
        descriptor.BindValuesExplicitly();
        foreach (var option in _metadata.OptionSet.Options)
        {
            int optionValue = option.Value.GetValueOrDefault();
            descriptor
                .Value(optionValue)
                .Name(option.Label.GetLocalizedLabel() ?? optionValue.ToString())
                .Description(option.Description?.GetLocalizedLabel());
        }
    }
}

There doesn't seem much room for error here but every time I run the app I get an ArgumentException on the line where I set the Value saying System.ArgumentException: '`100000000` is not a valid GraphQL type name. (Parameter 'value')' or something similar with the following stack trace:

   at HotChocolate.NameString..ctor(String value)
   at HotChocolate.Types.Descriptors.DefaultNamingConventions.GetEnumValueName(Object value)
   at HotChocolate.Types.Descriptors.EnumValueDescriptor..ctor(IDescriptorContext context, Object runtimeValue)
   at HotChocolate.Types.Descriptors.EnumTypeDescriptor.Value[T](T value)
   at MyProject.GraphQl.Types.OptionSetType.Configure(IEnumTypeDescriptor`1 descriptor)

What am I doing wrong? The documentation suggests I'm doing everything right (except I'm using int, instead of string as shown in the example).