ANPR Setup issues

Hi
Im currently trying to setup a camera which supports ANPR , Firmware is complete no issues but when I follow doc https://forum.use-ip.co.uk/threads/how-to-set-up-hikvision-anpr.723/
and Try and save the Detection Configuration Changes it comes up with:
Third Stream cannot be used after the vehicle detection function is enabled.
could anyone shed any light.

Cheers
Eddie