A user got this error message she clicked on my theme’s store badge link, the theme was just published last week. It turned out that her phone is on Android 9 and the theme only support Android 10 and 11.
So, the error message should be stating about OS incompatibility rather than stating the content is too old.
I don’t know if there is a direct support within Galaxy Themes Studio. I always file tickets through Seller Portal’s support for both themes and watch faces. Thanks Ron.