This fixes the bug where you get multiple Level Up dialogs when going to bed, even if you have already seen those dialogs. Introduced in version 1.5 of the game. Bug report on the forums from 2021-01-11.

Below are displayed all players detected in your save file, and their newLevels values. If you see extra levels, click the button to remove them. In the event that you have this bug, but this doesn't show anything, contact me with your save file.