APKs being over-written

I have 5 APKs I've built in Unity 2022.3.7f1. This project has worked in my Quest 2 before, multiple APKs uploaded from it. When I install the APKs (sidequest, ADB, dev console) the uploaded APK overwrites the previous one. I can do this individually or in bulk. Individually the APKs run perfectly on the headset. There are no error messages and no other issues. I have performed a factory reset on the headset, changed project identifiers and file names. This is a project that has been working for several months, I've delivered a bunch of work-in-progress APKs to a client from it without any problems. Tonight is, of course, the deadline. Any suggestions gratefully received.