how to use custom serializer AND retain model version

[conor-roche-rockalltech]

I have a versioned model class which has a field that i would like to use a custom serializer on:

@JsonVersionedModel(currentVersion = "1", toCurrentConverterClass = ToCurrentLoanPolicyOverrideConverter.class)
public class LoanPolicyOverride extends LaserData {

    @JsonSerialize(using = PolicyIdSerializer.class)
    private Policy policy;

}

But when I do the modelVersion attribute is lost in the serialized json.

Here the serializer should only outut the id of the Policy object, i have tried two approaches for the serializer:

1. Simple approach like this:

public void serialize(
        Policy value, JsonGenerator jgen, SerializerProvider provider)
        throws IOException, JsonProcessingException {

    jgen.writeStartObject();
    jgen.writeStringField("id", value.getId());
    jgen.writeEndObject();
}

2. approach that modifies the object so only the id field is set:

public void serialize(
        Policy value, JsonGenerator jgen, SerializerProvider provider)
        throws IOException, JsonProcessingException {
    if (value == null) {
        jgen.writeNull();
    } else {
        Policy simple = Policy.builder(value.getClassification().getClassificationCode().getCode()).id(value.getId()).build();
        BeanSerializerFactory.instance.createSerializer(provider, SimpleType.construct(Policy.class)).serialize(simple, jgen, provider);
    }
}

Any ideas on how to use a custom serializer AND keep the model version?