cachy-update but also sudo pacman -S lightdm lightdm-gtk-greeter-settings fail with the same error:
error: failed to commit transaction (conflicting files)
lightdm-gtk-greeter-settings: /usr/lib/python3.14/site-packages/lightdm_gtk_greeter_settings/__pycache__/installation_config.cpython-314.pyc exists in filesystem
Errors occurred, no packages were upgraded.
The bug may pose some difficulties to people who just want to update their system. The workaround:
Delete the folder: /usr/lib/python3.14/site-packages/lightdm_gtk_greeter_settings/_pycache_/
About my system: