salut tt le monde ,j'ai un probleme lors de la suppression d'un objet j'ai pa pu le résoudre (mm j'ai essaye de supprimer les fils de cet objet lors de sa suppression SVP aidez moi
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	private Set<DrivingLicense> drivingLicenses = new HashSet<DrivingLicense>(0);
	private Set<EmployeeJob> employeeJobs = new HashSet<EmployeeJob>(0);
	private Set<EmployeeChildren> employeeChildrens = new HashSet<EmployeeChildren>(
			0);
	private Set<EmergencyContacts> emergencyContactses = new HashSet<EmergencyContacts>(
			0);
	private Set<Contacts> contactses = new HashSet<Contacts>(0);
	private Set<EmployeeLanguages> employeeLanguageses = new HashSet<EmployeeLanguages>(
			0);
les set et get
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@OneToMany(fetch = FetchType.EAGER, mappedBy = "employee", cascade = CascadeType.ALL)
	public Set<DrivingLicense> getDrivingLicenses() {
		return this.drivingLicenses;
	}
 
	public void setDrivingLicenses(Set<DrivingLicense> drivingLicenses) {
		this.drivingLicenses = drivingLicenses;
	}
 
	@OneToMany(fetch = FetchType.LAZY, mappedBy = "employee", cascade = CascadeType.ALL)
	public Set<EmployeeJob> getEmployeeJobs() {
		return this.employeeJobs;
	}
 
	public void setEmployeeJobs(Set<EmployeeJob> employeeJobs) {
		this.employeeJobs = employeeJobs;
	}
 
	@OneToMany(fetch = FetchType.EAGER, mappedBy = "employee", cascade = CascadeType.ALL)
	public Set<EmployeeChildren> getEmployeeChildrens() {
		return this.employeeChildrens;
	}
 
	public void setEmployeeChildrens(Set<EmployeeChildren> employeeChildrens) {
		this.employeeChildrens = employeeChildrens;
	}
 
	@OneToMany(fetch = FetchType.LAZY, mappedBy = "employee", cascade = CascadeType.ALL)
	public Set<EmergencyContacts> getEmergencyContactses() {
		return this.emergencyContactses;
	}
 
	public void setEmergencyContactses(
			Set<EmergencyContacts> emergencyContactses) {
		this.emergencyContactses = emergencyContactses;
	}
 
	@OneToMany(fetch = FetchType.LAZY, mappedBy = "employee", cascade = CascadeType.ALL)
	public Set<Contacts> getContactses() {
		return this.contactses;
	}
 
	public void setContactses(Set<Contacts> contactses) {
		this.contactses = contactses;
	}
 
	@OneToMany(fetch = FetchType.LAZY, mappedBy = "employee",cascade=CascadeType.ALL)
	public Set<EmployeeLanguages> getEmployeeLanguageses() {
		return this.employeeLanguageses;
	}
 
	public void setEmployeeLanguageses(
			Set<EmployeeLanguages> employeeLanguageses) {
		this.employeeLanguageses = employeeLanguageses;
	}

la methode delete :

@Override
@Transactional(propagation = Propagation.REQUIRED, rollbackFor = Exception.class)
public void delete(Employee employee) {
entityManager.remove(entityManager.find(Employee.class,
employee.getId()));

}

erreur :
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WARNING: #{employeeMB.delete}: org.springframework.orm.jpa.JpaObjectRetrievalFailureException: deleted entity passed to persist: [com.icontech.apps.iconapplications.model.Employee#<null>]; nested exception is javax.persistence.EntityNotFoundException: deleted entity passed to persist: [com.icontech.apps.iconapplications.model.Employee#<null>]
javax.faces.FacesException: #{employeeMB.delete}: org.springframework.orm.jpa.JpaObjectRetrievalFailureException: deleted entity passed to persist: [com.icontech.apps.iconapplications.model.Employee#<null>]; nested exception is javax.persistence.EntityNotFoundException: deleted entity passed to persist: [com.icontech.apps.iconapplications.model.Employee#<null>]
	at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:118)
	at javax.faces.component.UICommand.broadcast(UICommand.java:315)
	at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:794)
	at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1259)
	at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
	at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
	at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:306)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:79)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:244)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:244)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:312)
	at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:116)
	at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:83)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:324)
	at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:324)
	at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:101)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:324)
	at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:324)
	at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:54)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:324)
	at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:324)
	at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:182)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:324)
	at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:105)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:324)
	at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:324)
	at org.springframework.security.web.session.ConcurrentSessionFilter.doFilter(ConcurrentSessionFilter.java:125)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:324)
	at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:174)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:237)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:167)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:244)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter.doFilterInternal(OpenEntityManagerInViewFilter.java:113)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:244)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:108)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:558)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:379)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:243)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:259)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:281)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:662)
Caused by: javax.faces.el.EvaluationException: org.springframework.orm.jpa.JpaObjectRetrievalFailureException: deleted entity passed to persist: [com.icontech.apps.iconapplications.model.Employee#<null>]; nested exception is javax.persistence.EntityNotFoundException: deleted entity passed to persist: [com.icontech.apps.iconapplications.model.Employee#<null>]
	at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:102)
	at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
	... 60 more
Caused by: org.springframework.orm.jpa.JpaObjectRetrievalFailureException: deleted entity passed to persist: [com.icontech.apps.iconapplications.model.Employee#<null>]; nested exception is javax.persistence.EntityNotFoundException: deleted entity passed to persist: [com.icontech.apps.iconapplications.model.Employee#<null>]
	at org.springframework.orm.jpa.EntityManagerFactoryUtils.convertJpaAccessExceptionIfPossible(EntityManagerFactoryUtils.java:291)
	at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:104)
	at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:471)
	at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:754)
	at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:723)
	at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:393)
	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:120)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
	at $Proxy45.deleteById(Unknown Source)
	at com.icontech.apps.iconapplications.web.EmployeeMB.delete(EmployeeMB.java:916)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.apache.el.parser.AstValue.invoke(AstValue.java:262)
	at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:278)
	at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
	at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:88)
	... 61 more
Caused by: javax.persistence.EntityNotFoundException: deleted entity passed to persist: [com.icontech.apps.iconapplications.model.Employee#<null>]
	at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1217)
	at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1168)
	at org.hibernate.ejb.TransactionImpl.commit(TransactionImpl.java:81)
	at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:467)
	... 77 more