Hot water option showing in app, but shouldn't be there?

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I've just setup a new wired smart thermostat with my combi-boiler, which mostly seems to be working well, however for some reason the app is displaying the hot water button and allows me to change it's settings.

As I have a combi-boiler I assume this shouldn't be active? How can I remove it from the app, and if someone in my home changes the hot water settings what would actually happen?

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