use sharding-jdbc to divide the table, and there is no problem when operating the jpa, used by the database to insert a single piece of data:
for (int i = 1; i < 10; iPP) {
Sharding sharding = new Sharding();
sharding.setAppId("1001");
sharding.setNum(i);
shardingRepository.save(sharding);
}the error message is as follows:
javax.persistence.EntityExistsException: A different object with the same identifier value was already associated with the session : [com.zkzong.sj.entity.Sharding-sharp1]what is the reason for this?