Install older App versions of Locus
For testing reasons I wanted to install an older App version of Locus (currently I've installed latest Locus version). So I followed manual https://docs.locusmap.app/doku.php?id=manual:faq:devices_older_android and downloaded an older version from here: https://drive.google.com/drive/folders/1U8U1D-NGQ9CAnqXAkleEXi46wH2T7tMR
The problem: If trying to install it on my Android 13 phone it's being refused with the message: "App not installed as package appears to be invalid".
What's the problem here, and whats the best method to quickly install an older Locus version if already have installed an actual version, and keep its settings, tracks, maps and elevation-files?