#vulnerable code 
                                void removeNodeEntity(Object entity, boolean deregisterDependentRelationshipEntity) {

        Long id = nativeId(entity);

        nodeEntityRegister.remove(id);
        final ClassInfo primaryIndexClassInfo = metaData.classInfo(entity);
        final FieldInfo primaryIndexField = primaryIndexClassInfo
            .primaryIndexField(); // also need to add the class to key to prevent collisions.
        if (primaryIndexField != null) {
            final Object primaryIndexValue = primaryIndexField.read(entity);
            if (primaryIndexValue != null) {
                primaryIndexNodeRegister.remove(new LabelPrimaryId(primaryIndexClassInfo, primaryIndexValue));
            }
        }

        if (deregisterDependentRelationshipEntity) {
            deregisterDependentRelationshipEntity(entity);
        }
    } 
                            #location 8 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                boolean removeRelationship(MappedRelationship mappedRelationship) {
        return relationshipRegister.remove(mappedRelationship);
    }