Can't install any 6x Sapphire watchface for 19.21

After having 25.00, some days ago I tried battery saver and gues what? After one night, with battery saver on, I lost 30% of battery life. Made a downgrade to 19.21 but now I can't install any watch faces because is telling me to update so garmin is fu** me and force me to install firmware versions that I don't want. What can I do ?

To get the latest version of this app, you must update your fenix 6X Sapphire in garmin express. Maybe I don't want the latest app version but the compatible one!