How to delete photo's from Siri's face in WatchOS 6?

Hi

I have WatchOS 6 and iOS 13.1, I would like to turn off photos on the Siri Watch Face. The following isn't available through Watch App on iPhone (My Watch (tab) > under My Faces", tap on your Siri watch face > in the list of Data Sources, turn off Photos).

Is this bug or has this option been moved?