Before Lunatask got a proper journaling implementation in the spring of last year, one could use notes and their ability to have a mood, energy level, and emotions attached.
This was a workaround for the time being until the dedicated journaling section gets implemented. Since barely anyone uses this feature these days, we are deprecating it and will remove it in the next major update.
Lunatask v1.7.5 will start showing an in-app deprecation warning, and v1.8 (probably coming in the first half of October 2023) will ship without this feature.