JPA Spring Boot postgresql : Insert data with the last ID - postgresql

Question

I have a MyClass entity with an auto increment id at the time of the project deployment I have an init.sql file to initialize the MY_CLASS table by adding two lines
the problem when I use my web service REST to insert a new line in the MY_CLASS table I have an error message of duplicate key of id 1 for the first click and id 2 on the second click but after the POST goes without problems. To solve this problem I can add the following line in my init.sql file
ALTER SEQUENCE MY_CLASS_id_seq RESTART WITH 3;
My question: How can I configure my POST to persist the data with the last id because whenever I can insert data with SQL.
#Entity
#Cacheable
#Getter
#Setter
#Table(name = "MY_CLASS")
public class MyClass {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
#NotNull
private String label;
}
#RepositoryRestResource(collectionResourceRel = "clazz", path = "clazz")
public interface MyClassRepository extends PagingAndSortingRepository<MyClass, Long> {
}
init.sql
INSERT INTO public.MY_CLASS (label) values('label_1');
INSERT INTO public.MY_CLASS (label) values('label_2');

Answer 1

Wouldn't you use the sequence generator, would you?
public class MyClass {
public static final String SEQUENCE_NAME = "MY_CLASS_id_seq";
#Id
#GeneratedValue(strategy = SEQUENCE, generator = SEQUENCE_NAME)
#SequenceGenerator(name = SEQUENCE_NAME, sequenceName = SEQUENCE_NAME)
private Long id;
#NotNull
private String label;
}