SpringBoot IncorrectResultSizeDataAccessException after upgrade from 3.5.5 to 3.5.6

After upgrading from version 3.5.5 to 3.5.6, a method that previously worked correctly now throws the following exception:

 long count = reqRepo.deleteAllByCreatedAtBefore(now.plusMinutes(1L));

org.springframework.dao.IncorrectResultSizeDataAccessException: 
Delete query returned more than one element: expected 1, actual 5

This seems to indicate that the delete operation is unexpectedly returning multiple results, whereas only one was expected. This behavior was not present in 3.5.5.

Code

  @Test
  void testDeleteAllByCreatedAtBefore(){
    var now = ZonedDateTime.now();
    List<RestData> data = createRestDataList();
    reqRepo.saveAll(data);
    reqRepo.flush();
    Assertions.assertEquals(5, reqRepo.findAll().size());
    long count = reqRepo.deleteAllByCreatedAtBefore(now.plusMinutes(1L));
    Assertions.assertEquals(5, count);
    Assertions.assertEquals(0, reqRepo.findAll().size());
  }

Comment From: bclozel

I think this duplicates https://github.com/spring-projects/spring-data-jpa/issues/4015