How to delete photo's from Siri's face in iwatch series 3

I have synced album with no photo's using my watch app and I can see no photo's in photo's app on iwatch. But however I can still see images when I select Siri face and also if I go to general>About I can still see number of photo's stored in iwatch.

I'm using iPhone 7 with iOS is 11.1.1 and WatchOS version 4.1

Does anyone of you face same issue? If so then share the solution.