Cannot install cctv outside hub house?

Received a notice by town council stating that infringe the law by installation of cctv.

The thing is the cctv has been installed for 15 years. As we are staying the corner unit, the cctv is only capture the corridor, never directly capture neighbours door/window. It’s just for safety purposes. Read straits times on the news ‘HDB said that since May, flat owners are no longer required to seek its approval to install corridor-facing CCTV cameras within their homes. However, such cameras should not face the door or windows of another flat to safeguard the privacy of neighbours.’

So what’s the problem? Anyone face the same issue?