Spring boot app unnecessarily adds _class property in redis

I have below POJO "MyClass" which is being saved in Redis.

class MyClass { @Id private String someId; private GenericAnimalID genericAnimalID; @Transient private GenericAnimal genericAnimal}class GenericAnimalId{                       String variant;                       String size;                }class SpecificAnimalId extends GenericAnimalId{                       String someProperty;                }class GenericAnimal{                   @Id                   GenericAnimalId genericAnimalId;                   String name;            }

So,basically I am storing MyClass in redis which has "genericAnimalID" property.

Now,when I store some Id having type of SpecificAnimalId,an extra property gets inserted in Redis as

{genericAnimalId._class : package.SpecificAnimalId,genericAnimalId : tiger}

Whereas,when I store Id of type GenericAnimalId,it works fine and only inserts the Id value what I expect.

{"genericAnimalId":animal}

In first case,it causes converter issues while reading this value.While in second case,no extra property gets inserted and code works fine after this.