This is a really old issue - November 2023 - still reference in the stable announcement thread
As for custom packages - disable the pamac option to upgrade custom scripts from AUR and to use AUR - please see
- [root tip] [HowTo] Check if your AUR build scripts have been updated
- [root tip] [How To] Update Manjaro the smart way
- [Need-To-Know] About Manjaro and AUR
After you have synced your system to the new package level - you need to rebuild your custom packages.
pamac build $(pacman -Qqm)