On the current GDL Carbon patch 2.0.20, and possibly before, it seems that when updating a modpack to a new version, mods that may have been removed by the devs aren't being removed.
This can be remedied by manually removing the mods, but the modpack version switcher should be doing this on its own.
Modpack tested, ATM9TTS, updating from versions 1.0.1 to 1.0.2 and from 1.0.2 to 1.0.3
On the current GDL Carbon patch
2.0.20
, and possibly before, it seems that when updating a modpack to a new version, mods that may have been removed by the devs aren't being removed.This can be remedied by manually removing the mods, but the modpack version switcher should be doing this on its own.
Modpack tested, ATM9TTS, updating from versions 1.0.1 to 1.0.2 and from 1.0.2 to 1.0.3