In the official documentation, I have read that if you extend PanacheEntityBase instead of PanacheEntity, you can not use default methods, which you do correctly.

I have two answers for your question:

one can you please add type parameter to your PanacheEntityBase like.

public class PersonRepository implements PanacheRepositoryBase<Person,Integer>

Here is the source:

https://quarkus.io/guides/hibernate-orm-panache

If it does not work, please try parameter binding:

public static Person findById(Long id) {
    return find("id = ?1", id).firstResult();
}

Please let me know, so I can edit the answer with correct version.

Thanks.