#vulnerable code 
                                @Override
    public boolean save() {
        if (hasColumn(COLUMN_CREATED) && get(COLUMN_CREATED) == null) {
            set(COLUMN_CREATED, new Date());
        }
        if (null == get(getPrimaryKey()) && String.class == getPrimaryType()) {
            set(getPrimaryKey(), StringUtils.uuid());
        }

        Boolean autoCopyModel = get(AUTO_COPY_MODEL);
        boolean saveSuccess = autoCopyModel == true ? copyModel().saveNormal() : saveNormal();
        if (saveSuccess) {
            Jboot.sendEvent(addAction(), this);
        }
        return saveSuccess;
    } 
                            #location 11 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                @Override
    public boolean save() {
        if (hasColumn(COLUMN_CREATED) && get(COLUMN_CREATED) == null) {
            set(COLUMN_CREATED, new Date());
        }
        if (null == get(getPrimaryKey()) && String.class == getPrimaryType()) {
            set(getPrimaryKey(), StringUtils.uuid());
        }

        Boolean autoCopyModel = get(AUTO_COPY_MODEL);
        boolean saveSuccess = (autoCopyModel != null && autoCopyModel) ? copyModel().saveNormal() : saveNormal();
        if (saveSuccess) {
            Jboot.sendEvent(addAction(), this);
        }
        return saveSuccess;
    }