Erro Salvar obj Multiple representations of the same entity

Programação Java
#1

Bom dia Pessoal, tenho o seguinte cenario:

@ManyToMany(cascade = CascadeType.ALL)
@JoinTable(name = "georef_point_x_stretch", joinColumns = { @JoinColumn(name = "stretch_id", referencedColumnName = "id") })
private Set<GeorefPoint> georefPoint;
----


	   HashSet<GeorefPoint> hsc1 = new HashSet<GeorefPoint>();
	   for(Ponto post: trecho.getPontos()) {
	        hsc.add(new Cliente("Pedro de Lara","Rua 20 de março","7568-8524"));*/
	   }
		stretch.setGeorefPoint(hsc1);
	   
	   try {
		   stretchRepository.save(stretch);			
		} catch (Exception e) {
			System.out.println("sdafdsafsd"+e.getMessage());
		}

Esta dando o erro abaixo, quando salva o obj.

org.springframework.dao.InvalidDataAccessApiUsageException: Multiple representations of the same entity [br.com.inspecao.order.entity.GeorefPoint#1]
are being merged. Detached: [br.com.inspecao.order.entity.GeorefPoint@6724b51e]; Detached: [br.com.inspecao.order.entity.GeorefPoint@dd570146];
nested exception is java.lang.IllegalStateException:
Multiple representations of the same entity [br.com.inspecao.order.entity.GeorefPoint#1]
are being merged. Detached: [br.com.inspecao.order.entity.GeorefPoint@6724b51e]; Detached: [br.com.inspecao.order.entity.GeorefPoint@dd570146]

Alguém pode me ajudar ??

#2

Vê se isto te ajuda;