Yeah, I agree with @orangebucket.
This property is used to group the states of the capabilities according to the given value and show them in the Dashboard View.
The picture below belongs to a device that shows the states of two different capabilities (VID: 7a763ca9-9c87-3fd2-81cb-edbe58a62f16):
If you want to show just one state, you have to remove the
group property and update the capability presentation. Then, you need to re-generate the device presentation (the VID won’t change) and, as you’re using a DTH, I suggest you create a new one (with the same configuration) to avoid the caching process.