By default, Homey logs all the data it can, so you can easily analyze everything through Insights. However, sometimes, some data is better left unlogged.
To prevent Homey creating logs and Insights about a data source, simply log in to Homey and navigate to Insights. Find the data source to block, and hover over the 3 dots right to it. In the pop-up, you can simply click 'do not log this' to stop and prevent logging.
That's it! Homey will now disregard all logs this data source creates, and won't save anything that happens. Please note, that, while you can later enable logging again for the future, this cannot be reversed in hindsight. Non-logged data is unretrievable.