Release 27.0.2 is the third release in the Horizon 27 series.
It contains a few bug fixes including a critical fix to a regression in 27.0.1 that would keep OpenNMS from starting if you had existing reports in the database.
BREAKING: If you created any reports with 27.0.1, they will need to be recreated.
For a high-level overview of what has changed in Horizon 27, see What’s New in OpenNMS Horizon 27.
The codename for 27.0.2 is Deep Thought.