Program: 62155
Project: 62155
Buggy source:
public void onCopyConfiguration(OnDeploymentConfigCopyEvent onDeploymentConfigCopyEvent){
  ApplicationEnvironment source=onDeploymentConfigCopyEvent.getSourceEnvironment();
  ApplicationEnvironment target=onDeploymentConfigCopyEvent.getTargetEnvironment();
  DeploymentMatchingConfiguration sourceConfiguration=alienDAO.findById(DeploymentMatchingConfiguration.class,AbstractDeploymentConfig.generateId(source.getTopologyVersion(),source.getId()));
  DeploymentMatchingConfiguration targetConfiguration=alienDAO.findById(DeploymentMatchingConfiguration.class,AbstractDeploymentConfig.generateId(target.getTopologyVersion(),target.getId()));
  if (sourceConfiguration == null || MapUtils.isEmpty(sourceConfiguration.getLocationGroups()) || targetConfiguration == null || MapUtils.isEmpty(targetConfiguration.getLocationGroups())) {
    return;
  }
  Topology topology=topologyServiceCore.getOrFail(Csar.createId(target.getApplicationId(),target.getTopologyVersion()));
  if (MapUtils.isNotEmpty(topology.getNodeTemplates())) {
    Application application=applicationService.getOrFail(target.getApplicationId());
    FlowExecutionContext executionContext=new FlowExecutionContext(alienDAO,topology,new EnvironmentContext(application,target));
    flowExecutor.execute(topology,getMatchingFlow(),executionContext);
    Map<String,Set<String>> locResTemplateIdsPerNodeIds=(Map<String,Set<String>>)executionContext.getExecutionCache().get(FlowExecutionContext.SELECTED_MATCH_NODE_LOCATION_TEMPLATE_BY_NODE_ID_MAP);
    Map<String,String> validOnNewEnvSubstitutedNodes=safe(sourceConfiguration.getMatchedLocationResources()).entrySet().stream().filter(entry -> locResTemplateIdsPerNodeIds.containsKey(entry.getKey()) && locResTemplateIdsPerNodeIds.get(entry.getKey()).contains(entry.getValue())).collect(Collectors.toMap(Map.Entry::getKey,Map.Entry::getValue));
    if (MapUtils.isNotEmpty(validOnNewEnvSubstitutedNodes)) {
      if (targetConfiguration.getMatchedLocationResources() == null) {
        targetConfiguration.setMatchedLocationResources(Maps.newHashMap());
      }
      validOnNewEnvSubstitutedNodes.forEach((key,value) -> {
        targetConfiguration.getMatchedLocationResources().put(key,value);
        targetConfiguration.getMatchedNodesConfiguration().put(key,safe(sourceConfiguration.getMatchedNodesConfiguration()).get(key));
      }
);
      alienDAO.save(targetConfiguration);
    }
  }
}

Fixed version (ground truth):
public void onCopyConfiguration(OnDeploymentConfigCopyEvent onDeploymentConfigCopyEvent){
  ApplicationEnvironment source=onDeploymentConfigCopyEvent.getSourceEnvironment();
  ApplicationEnvironment target=onDeploymentConfigCopyEvent.getTargetEnvironment();
  DeploymentMatchingConfiguration sourceConfiguration=deploymentConfigurationDao.findById(DeploymentMatchingConfiguration.class,AbstractDeploymentConfig.generateId(source.getTopologyVersion(),source.getId()));
  DeploymentMatchingConfiguration targetConfiguration=deploymentConfigurationDao.findById(DeploymentMatchingConfiguration.class,AbstractDeploymentConfig.generateId(target.getTopologyVersion(),target.getId()));
  if (sourceConfiguration == null || MapUtils.isEmpty(sourceConfiguration.getLocationGroups()) || targetConfiguration == null || MapUtils.isEmpty(targetConfiguration.getLocationGroups())) {
    return;
  }
  Topology topology=topologyServiceCore.getOrFail(Csar.createId(target.getApplicationId(),target.getTopologyVersion()));
  if (MapUtils.isNotEmpty(topology.getNodeTemplates())) {
    Application application=applicationService.getOrFail(target.getApplicationId());
    FlowExecutionContext executionContext=new FlowExecutionContext(deploymentConfigurationDao,topology,new EnvironmentContext(application,target));
    flowExecutor.execute(topology,getMatchingFlow(),executionContext);
    Map<String,Set<String>> locResTemplateIdsPerNodeIds=(Map<String,Set<String>>)executionContext.getExecutionCache().get(FlowExecutionContext.SELECTED_MATCH_NODE_LOCATION_TEMPLATE_BY_NODE_ID_MAP);
    Map<String,String> validOnNewEnvSubstitutedNodes=safe(sourceConfiguration.getMatchedLocationResources()).entrySet().stream().filter(entry -> locResTemplateIdsPerNodeIds.containsKey(entry.getKey()) && locResTemplateIdsPerNodeIds.get(entry.getKey()).contains(entry.getValue())).collect(Collectors.toMap(Map.Entry::getKey,Map.Entry::getValue));
    if (MapUtils.isNotEmpty(validOnNewEnvSubstitutedNodes)) {
      if (targetConfiguration.getMatchedLocationResources() == null) {
        targetConfiguration.setMatchedLocationResources(Maps.newHashMap());
      }
      validOnNewEnvSubstitutedNodes.forEach((key,value) -> {
        targetConfiguration.getMatchedLocationResources().put(key,value);
        targetConfiguration.getMatchedNodesConfiguration().put(key,safe(sourceConfiguration.getMatchedNodesConfiguration()).get(key));
      }
);
      deploymentConfigurationDao.save(targetConfiguration);
    }
  }
}