#vulnerable code 
                                private Map<String, Object> doUpdate(EntityManager entityManager, int ciTypeId, Map<String, Object> ci, boolean enableStateTransition) {
        DynamicEntityMeta entityMeta = getDynamicEntityMetaMap().get(ciTypeId);
        Map<String, Object> convertedCi = MultiValueFeildOperationUtils.convertMultiValueFieldsForCICreation(entityManager, ciTypeId, ci, (String) ci.get(CmdbConstants.DEFAULT_FIELD_GUID), ciTypeAttrRepository, this);

        String guid = convertedCi.get(GUID).toString();
        Object entityBean = validateCi(ciTypeId, guid, entityMeta, entityManager, ACTION_MODIFICATION);
        DynamicEntityHolder entityHolder = new DynamicEntityHolder(entityMeta, entityBean);

        ciDataInterceptorService.preUpdate(entityHolder, convertedCi);
        Map<String, Object> updatedMap = null;
        if (onlyIncludeRefreshableFields(ciTypeId, convertedCi.keySet()) || !enableStateTransition) {
            entityHolder.update(convertedCi, CmdbThreadLocal.getIntance().getCurrentUser(), entityManager);
            entityManager.merge(entityHolder.getEntityObj());
        } else {
            updatedMap = stateTransEngine.process(entityManager, ciTypeId, guid, StateOperation.Update.getCode(), convertedCi, entityHolder);
        }

        ciDataInterceptorService.postUpdate(entityHolder, entityManager, ci);
        updatedMap = ClassUtils.convertBeanToMap(entityHolder.getEntityObj(), entityHolder.getEntityMeta(), false);
        return updatedMap;
    } 
                            #location 5 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                private Map<String, Object> doUpdate(EntityManager entityManager, int ciTypeId, Map<String, Object> ci, boolean enableStateTransition) {
        DynamicEntityMeta entityMeta = getDynamicEntityMetaMap().get(ciTypeId);

        String guid = ci.get(GUID).toString();
        Object entityBean = validateCi(ciTypeId, guid, entityMeta, entityManager, ACTION_MODIFICATION);
        DynamicEntityHolder entityHolder = new DynamicEntityHolder(entityMeta, entityBean);

        ciDataInterceptorService.preUpdate(entityHolder, ci);
        Map<String, Object> convertedCi = MultiValueFeildOperationUtils.convertMultiValueFieldsForCICreation(entityManager, ciTypeId, ci, (String) ci.get(CmdbConstants.DEFAULT_FIELD_GUID), ciTypeAttrRepository, this);
        Map<String, Object> updatedMap = null;
        if (onlyIncludeRefreshableFields(ciTypeId, convertedCi.keySet()) || !enableStateTransition) {
            entityHolder.update(convertedCi, CmdbThreadLocal.getIntance().getCurrentUser(), entityManager);
            entityManager.merge(entityHolder.getEntityObj());
        } else {
            updatedMap = stateTransEngine.process(entityManager, ciTypeId, guid, StateOperation.Update.getCode(), convertedCi, entityHolder);
        }

        ciDataInterceptorService.postUpdate(entityHolder, entityManager, ci);
        updatedMap = ClassUtils.convertBeanToMap(entityHolder.getEntityObj(), entityHolder.getEntityMeta(), false);
        return updatedMap;
    }